Common Core: 7th Grade Math : Understand Fraction of Outcomes: CCSS.Math.Content.7.SP.C.8a

Study concepts, example questions & explanations for Common Core: 7th Grade Math

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Example Questions

Example Question #11 : Understand Fraction Of Outcomes: Ccss.Math.Content.7.Sp.C.8a

Dan has a bag of  marbles:  red marbles, , yellow marbles, and  blue marbles,  purple marble, and  orange. If the first marble he draws is a blue marble, then what is the probability that he will draw another blue marble on his second try? 

 

Possible Answers:

Correct answer:

Explanation:

Dan starts out with  marbles, and  of the marbles are blue. This means that the probability of Dan drawing a blue marble from the bag on his first attempt is 

Now that Dan has taken a blue marble from the bag, we have  blue marbles left, and a total of  marbles left in the bag; thus, the probability of Dan drawing a blue marble on his second attempt is 

Example Question #12 : Understand Fraction Of Outcomes: Ccss.Math.Content.7.Sp.C.8a

Dan has a bag of  marbles:  red marbles, , yellow marbles, and  blue marbles,  purple marble, and  orange. If the first marble he draws is a red marble, then what is the probability that he will draw another red marble on his second try? 

 

 

Possible Answers:

Correct answer:

Explanation:

Dan starts out with  marbles, and  of the marbles are red. This means that the probability of Dan drawing a red marble from the bag on his first attempt is 

Now that Dan has taken a red marble from the bag, we have  red marbles left, and a total of  marbles left in the bag; thus, the probability of Dan drawing a red marble on his second attempt is 

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