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2 years ago

14

Assume that there are 5 white mice and 7 black mice to choose from, and you randomly pick 4 mice. What is the probability that 2

are white and 2 are black

1 answer:

goldfiish [28.3K]2 years ago

6 0

$P(2\ white\ and\ 2\ black)=\frac{5C2\times7C2}{12C4}=\frac{14}{33}$
The answer is 14/33 or 0.424

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2 years ago

Evaluate the expression. P(9, 3) · P(5, 4)

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Answer:

$P(9,3) *P(5,4)$

And if we use the permutation formula given by:

$nPx = \frac{n!}{(n-x)!}$

And replacing we got:

$\frac{9!}{6!} \frac{5!}{4!}= 504*5 = 2520$

Step-by-step explanation:

For this problem we want to find the following expressionÑ

$P(9,3) *P(5,4)$

And if we use the permutation formula given by:

$nPx = \frac{n!}{(n-x)!}$

And replacing we got:

$\frac{9!}{6!} \frac{5!}{4!}= 504*5 = 2520$

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