ISEE Upper Level Quantitative : How to find the answer from a table

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

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Example Questions

Example Question #541 : Isee Upper Level (Grades 9 12) Quantitative Reasoning

A standard deck of 52 cards is altered by the addition of two jokers. A card is drawn at random. What are the odds against drawing an ace, a king, or a joker?

Possible Answers:

Correct answer:

Explanation:

The two jokers bring the deck to fifty-four cards; since there are four aces, four kings, and two jokers, there are ten favorable outcomes and forty-four unfavorable outcomes. This makes the odds against a favorable outcome

or 22 to 5.

Example Question #41 : How To Find The Answer From A Table

A card is drawn at random from a standard 52-card deck. 

Which of the following outcomes has probability ?

Possible Answers:

Drawing an Old Maid card.

Drawing a red face card (king, queen, jack).

Drawing a black four or a black five.

Drawing a heart.

Drawing a black three.

Correct answer:

Drawing a black four or a black five.

Explanation:

One thirteenth of 52 is 

so we are looking for an outcome that has four simple events - that is, four cards.

Drawing an Old Maid card: since a standard deck definitely does not have an Old maid card, this is incorrect.

Drawing a black three: there are two black threes, so this is not correct.

Drawing a red face card (king, queen, jack): This outcome includes two kings, two queens, and two jacks - six cards. This is not correct.

Drawing a heart: There are thirteen hearts, so this is not correct.

Drawing a black four or a black five: There are two black fours and two black fives - four cards. This is the correct response.

Example Question #42 : How To Find The Answer From A Table

A standard 52-card deck is combined with the hearts and the spades from another deck, and the modified deck is shuffled. What is the probability that a card drawn at random from this modified deck will be a spade?

Possible Answers:

Correct answer:

Explanation:

The modified deck will have 78 cards (the original 52 plus the added 26), 26 of which will be spades (the original 13 plus the added 13). The probability of drawing a spade will therefore be 

Example Question #43 : How To Find The Answer From A Table

A standard 52-card deck is combined with the diamonds and the clubs from another deck, and the modified deck is shuffled. 

Which is the greater quantity?

(A) The probability that a card drawn at random from this modified deck will be an ace.

(B) 

Possible Answers:

(A) is greater

(B) is greater

It is impossible to determine which is greater from the information given

(A) and (B) are equal

Correct answer:

(A) and (B) are equal

Explanation:

The modified deck will have 78 cards (the original 52 plus the added 26), 6 of which are aces (the original 4 plus the added ace of diamonds and ace of clubs); the probability that an ace will be drawn is

The quantities are equal.

Example Question #44 : How To Find The Answer From A Table

Two standard decks of fifty-two cards, which we will call Deck 1 and Deck 2, are presented to you. The kings have been removed from Deck 1 and mixed in with Deck 2. A card is then drawn at random from Deck 2.

What is the probability that the card will be a spade?

Possible Answers:

None of the other responses gives the correct answer.

Correct answer:

None of the other responses gives the correct answer.

Explanation:

After the four kings - one of which is a spade - are transferred between decks, Deck 2 has fourteen spades out of fifty-six cards overall. This makes the probability of drawing a spade

.

This is not among the given choices, so the correct response is "none of these".

Example Question #546 : Isee Upper Level (Grades 9 12) Quantitative Reasoning

Define a sequence as follows:

For integers .

Which is the greater quantity?

(a) 

(b) 

Possible Answers:

(b) is greater

(a) and (b) are equal

It is impossible to tell which is greater from the information given

(a) is greater

Correct answer:

(a) is greater

Explanation:

Subsituting:

Since the initial term of the sequence is positive, each subsequent term, 3 times the previous one, is positive, so

This makes (a) greater.

Example Question #62 : Data Analysis

Flight schedule

Above is a part of a schedule of flight arrivals; the common destination is New Orleans, Lousiana, which is located in the Central Time Zone (CT). Chicago and Houston are also in the CT; New York is in the Eastern Time Zone, which is one hour ahead of CT; Denver is in the Mountain Time Zone, one hour behind CT; Los Angeles is in the Pacific Time Zone, two hours behind CT. All arrival times are PM and are given in Central Time.

When Flight 289 took off, it was 1:39 PM at its point of departure. How long did the flight take? (You may assume all flights arrived on time.)

Possible Answers:

2 hours, 52 minutes

1 hour, 52 minutes

2 hours, 8 minutes

3 hours, 8 minutes

3 hours, 52 minutes

Correct answer:

2 hours, 52 minutes

Explanation:

Flight 289 departed from New York, which is in the Eastern Time Zone, one hour ahead of New Orleans. Since the flight took off when it was 1:39, subtract one hour; the flight took off when it was 12:39 in New Orleans. We need to subtract the adjusted departure time from the arrival time - however, this must be done by rewriting 12:39 as 0:39:

 

"Borrow" one hour as follows:

 

The flight was 2 hours, 52 minutes long.

Example Question #63 : Data Analysis

Flight schedule

Above is a part of a schedule of flight arrivals; the common destination is Atlanta, Georgia, which is located in the Eastern Time Zone. New York is also in the Eastern Time Zone; Chicago and Houston are in the Central Time Zone, which is one hour behind ET; Denver is in the Mountain Time Zone, two hours behind ET; Los Angeles is in the Pacific Time Zone, three hours behind ET. All arrival times are PM and are given in Eastern Time.

When Flight 23 took off, it was 11:21 AM at its point of departure. How long did the flight take? (You may assume all flights arrived on time.)

Possible Answers:

4 hours and 42 minutes

2 hours and 42 minutes

3 hours and 18 minutes

3 hours and 42 minutes

2 hours and 42 minutes

Correct answer:

2 hours and 42 minutes

Explanation:

Flight 23 took off from Denver, which is in the Mountain Time Zone - two hours behind Atlanta time. Since it was 11:21 AM there, two hours must be added to this time to determine the time in Atlanta - this is 1:21 PM. Since the flight arrived in Atlanta at 4:03, the flight time was

 

We can "borrow" one hour, then subtract, as follows:

 

The flight took 2 hours and 42 minutes.

Example Question #64 : Data Analysis

Flight schedule

Above is a part of a schedule of flight arrivals; the common destination is Atlanta, Georgia, which is located in the Eastern Time Zone. New York is also in the Eastern Time Zone (ET); Chicago and Houston are in the Central Time Zone, which is one hour behind ET; Denver is in the Mountain Time Zone, two hours behind ET; Los Angeles is in the Pacific Time Zone, three hours behind ET. All arrival times are PM and are given in Eastern Time.

Flight 289 lasted 1 hour 57 minutes. When it took off, what time was it at the location of its departure?

Possible Answers:

10:34 AM

12:34 PM

11:34 AM

2:34 PM

1:34 PM

Correct answer:

1:34 PM

Explanation:

Flight 289 took off from New York, which is in the same time zone as Atlanta, so no adjustments for Time Zone need to be made. Subtract 1 hour 57 minutes from the arrival time of 3:31:

 

We can "borrow" one hour and subtract as follows:

 

It was 1:34 PM in New York when the airplane departed.

Example Question #65 : Data Analysis

One ordinary six-sided die is altered such that the probability of tossing a six on that die is ; a second such die is altered such that the probability of tossing a six on that die is . For each die, the other five rolls are equally probable to one another. 

Which of the following is the greater quantity?

(a) The probability that the roll of two fair dice will come up a total of 12

(b) The probability that the roll of the two altered dice will come up a total of 12

Possible Answers:

It cannot be determined which of (a) and (b) is greater

(a) and (b) are equal

(a) is the greater quantity

(b) is the greater quantity

Correct answer:

(b) is the greater quantity

Explanation:

The only way for a roll of two dice to come up with a sum of 12 is for the dice to show a double-six. Apply the multiplication principle using the probability of a roll of six on each die.

The probability of a roll of six on a fair die is , so the probability of a double-six happening with the fair dice is .

The probability of a double-six on the altered dice is .

, so (b) is greater.

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