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Drupady [299]
3 years ago
9

What is the expected number of female children in a family with three children?

Mathematics
2 answers:
Basile [38]3 years ago
4 0

Answer:

Option B is the correct answer.

Step-by-step explanation:

Expected value of female children= Probability of female children x Total number of children.

A child can be male or female, so there are 2 combinations, favorable outcome is female.

Probability of female children =\frac{1}{2}

Expected value of female children =\frac{1}{2}\times 3=1.5

Option B is the correct answer.

Paladinen [302]3 years ago
3 0
The answer is 1.5 females, one way to solve this is to multiply the probability of a female (50%) with the number of girls in total = 3 multiplied by (50%) = 1.5.
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Step-by-step explanation:

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Multiply the second equation by -2.

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Add to the first equation (notice the y's cancel out).

(-3x + 16y) + (8x − 16y) = 9 − 24

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Solve for x.

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Now you can plug this into either equation to find y.

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