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3 years ago

HELPP PLEASE DUE TOMMOROW PLEASE ANSWER QUESTION B

Mathematics

1 answer:

marin [14]3 years ago

4 0

Answer:

28 non-blue marbles.

Step-by-step explanation:

Initial probability of choosing a blue marble = 4/12

Let the number of non-blue marbles to be added be x.

$\frac{4}{12+x} =\frac{1}{10}$

$12+x=40$ (cross multiply)

$x=28$

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3 years ago

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Answer:

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The start of the question doesn't matter entirely, although is interesting to read. What we are trying to do is find the value for $p$ such that $1000p(1-p)$ is maximized. Once we have that $p$ , we can easily find the answer to part b.

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2 years ago