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Please help me with this math problem thanks!

A. is 3a
b. is 3b

Please help me with this math problem thanks! A. is 3a b. is 3b-example-1
Please help me with this math problem thanks! A. is 3a b. is 3b-example-1
Please help me with this math problem thanks! A. is 3a b. is 3b-example-2

1 Answer

1 vote

Answer:

125

Explanation:

Given 10 of 16 marbles in a bag are black, you want to know the expected number of times a black marble will be drawn if a marble is drawn and replaced 200 times.

Expected number

The probability of drawing a black marble is the fraction of marbles that are black: 10/16 = 0.625. The expected number of draws of a black marble will be this value multiplied by the number of draws:

times picking black = 200 · 0.625 = 125

You can expect to pick a black marble 125 times.

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Additional comment

The usual caveats apply: each marble is equally likely to be drawn on any given draw. The draws are independent.

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