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ISEE Lower Level Quantitative : Probability

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

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All ISEE Lower Level Quantitative Resources

20 Diagnostic Tests 114 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #31 : How To Find The Probability Of An Outcome

A bag contains differently colored balls. In it are pink balls, red balls, and green balls. What is the probability of choosing a red ball at random?

Possible Answers:

$\frac{2}{5}$

$\frac{2}{3}$

$\frac{1}{5}$

$\frac{1}{3}$

Correct answer:

$\frac{2}{5}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are red balls and a total of balls in the bag. This is represented as the fraction: $\tfrac{6}{15}$ . This can be reduced to $\tfrac{2}{5}$ . The answer is $\tfrac{2}{5}$ .

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Example Question #32 : Data Analysis And Probability

A bag contains differently colored balls. In it are pink balls, red balls, and green balls. What is the probability of choosing a pink ball at random?

Possible Answers:

$\frac{2}{3}$

$\frac{1}{5}$

$\frac{1}{3}$

$\frac{2}{5}$

Correct answer:

$\frac{1}{3}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are red balls and a total of balls in the bag. This is represented as the fraction: $\tfrac{5}{15}$ . This can be reduced to $\tfrac{1}{3}$ . The answer is $\tfrac{1}{3}$ .

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Example Question #33 : Data Analysis And Probability

A game requires you to throw a ball at some randomly-arranged colored tiles in order to win a prize. There are white tiles, blue tiles, red tiles, and black tiles. What is the probability of hitting a black tile?

Possible Answers:

$\frac{1}{5}$

$\frac{1}{20}$

$\frac{1}{10}$

$\frac{1}{50}$

Correct answer:

$\frac{1}{10}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are black tiles and a total of tiles. This is represented as the fraction: $\tfrac{5}{50}$ . This can be reduced to $\tfrac{1}{10}$ . The answer is $\tfrac{1}{10}$ .

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Example Question #32 : How To Find The Probability Of An Outcome

Misha is choosing movies from a bin at a store. In the bin are action movies, comedies, documentaries, and other types of films. If she chooses randomly, what is the probability that Misha will pick out a comedy movie?

Possible Answers:

$\frac{1}{3}$

$\frac{5}{6}$

$\frac{2}{5}$

$\frac{2}{3}$

Correct answer:

$\frac{1}{3}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are comedy movies and a total of movies. This is represented as the fraction: $\tfrac{20}{60}$ . This can be reduced to $\tfrac{1}{3}$ . The answer is $\tfrac{1}{3}$ .

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Example Question #33 : How To Find The Probability Of An Outcome

Jessica has a box of chocolates. have buttercream filling, have cherry filling, have raspberry filling, have coconut filling, and have no filling. What is the probability of Jessica choosing a chocolate with no filling?

Possible Answers:

$\frac{1}{5}$

$\frac{3}{4}$

$\frac{2}{5}$

$\frac{1}{4}$

Correct answer:

$\frac{1}{4}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are chocolates with no filling and a total of chocolates. This is represented as the fraction: $\tfrac{5}{20}$ . This can be reduced to $\tfrac{1}{4}$ . The answer is $\tfrac{1}{4}$ .

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Example Question #34 : How To Find The Probability Of An Outcome

A group of kids are playing duck-duck-goose. In the circle sit third graders, fourth graders, and fifth graders. What is the probability that a third or fourth grader will be chosen?

Possible Answers:

$\frac{1}{2}$

$\frac{4}{5}$

$\frac{3}{4}$

$\frac{1}{8}$

Correct answer:

$\frac{3}{4}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are third and fourth graders and a total of students. This is represented as the fraction: $\tfrac{12}{16}$ . This can be reduced to $\tfrac{3}{4}$ . The answer is $\tfrac{3}{4}$ .

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Example Question #35 : How To Find The Probability Of An Outcome

A jar contains candy bars, lollipops, and other types of sweets. What is the probability of drawing a lollipop at random from the jar?

Possible Answers:

$\frac{1}{2}$

$\frac{2}{5}$

$\frac{3}{10}$

$\frac{1}{5}$

Correct answer:

$\frac{1}{5}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are lollipops and a total of pieces of candy. This is represented as the fraction: $\tfrac{2}{10}$ . This can be reduced to $\tfrac{1}{5}$ . The answer is $\tfrac{1}{5}$ .

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Example Question #36 : How To Find The Probability Of An Outcome

Jacob has mechanical pencils, colored pencils, and erasers in his bag. What is the probability of him taking out a colored pencil at random from the bag?

Possible Answers:

$\frac{4}{5}$

$\frac{1}{5}$

$\frac{2}{3}$

$\frac{1}{3}$

Correct answer:

$\frac{2}{3}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are colored pencils and a total of items. This is represented as the fraction: $\tfrac{10}{15}$ . This can be reduced to $\tfrac{2}{3}$ . The answer is $\tfrac{2}{3}$ .

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Example Question #31 : How To Find The Probability Of An Outcome

If Justin rolls a six-sided die, what is the probability of it landing on an even number?

Possible Answers:

$\frac{1}{2}$

$\frac{1}{6}$

$\frac{1}{3}$

Correct answer:

$\frac{1}{2}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are even numbers and a total of numbers on the die. This is represented as the fraction: $\tfrac{3}{6}$ . This can be reduced to $\tfrac{1}{2}$ . The answer is $\tfrac{1}{2}$ .

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Example Question #40 : Data Analysis And Probability

A store has a bin of books on sale. In the bin, there are novels, comic books, reference books, and picture books. What is the probability that someone will choose a novel from the bin?

Possible Answers:

$\frac{1}{2}$

$\frac{2}{5}$

$\frac{1}{5}$

${}\frac{1}{10}$

Correct answer:

$\frac{2}{5}$

Explanation:

Probability can be expressed as a fraction. The numerator represents the total number of what is being chosen and the denominator represents the total number of items that can be chosen. In this problem, there are novels and a total of books. This is represented as the fraction: $\tfrac{10}{25}$ . This can be reduced to $\tfrac{2}{5}$ . The answer is $\tfrac{2}{5}$ .

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All ISEE Lower Level Quantitative Resources

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ISEE Lower Level Quantitative : Probability

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

All ISEE Lower Level Quantitative Resources

Example Questions

Example Question #31 : How To Find The Probability Of An Outcome

Example Question #32 : Data Analysis And Probability

Example Question #33 : Data Analysis And Probability

Example Question #32 : How To Find The Probability Of An Outcome

Example Question #33 : How To Find The Probability Of An Outcome

Example Question #34 : How To Find The Probability Of An Outcome

Example Question #35 : How To Find The Probability Of An Outcome

Example Question #36 : How To Find The Probability Of An Outcome

Example Question #31 : How To Find The Probability Of An Outcome

Example Question #40 : Data Analysis And Probability

All ISEE Lower Level Quantitative Resources

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