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In Mathematics / Middle School | 2014-09-04

Tom doesn't really want to give away blue marbles and would like to change the probability that he chooses a blue marble to \(\frac{1}{10}\). How many marbles that are not blue could he add to the bag so that the probability of choosing a blue marble becomes \(\frac{1}{10}\)?

Asked by Anonymous

Answer (3)

he would need to add 36 non blue marbles to the bag.
40 4 ​ = 10 1 ​ this is true because when you can divide 4 into the top and bottom evenly giving you this equivalent.

Answered by secretlyblu | 2024-06-10

To change the probability of choosing a blue marble to 1/10, Tom needs to add 9 non-blue marbles for every blue marble already in the bag. ;

Answered by GlennClose | 2024-06-18

Tom can change the probability of choosing a blue marble to 10 1 ​ by adding non-blue marbles based on the formula z = 9 x − y , where x is the number of blue marbles and y is the number of non-blue marbles he starts with. For each blue marble, he needs to add 9 non-blue marbles. For example, if he has 2 blue and 3 non-blue marbles, he needs to add 15 non-blue marbles.
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Answered by GlennClose | 2024-09-03