3 years ago

Approximately what portion of the box is shaded blue? A.1/3 B.1/10 C. 1/6

1 answer:

3 0

B because I got it right

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Finger [1]

Answer: The director can choose first a lead singer and then a stand-in for the lead singer in 132 ways.

Step-by-step explanation:

Given : The total number of singers auditioning for the school musical.= 12

The director wanted choose first a lead singer and then a stand-in for the lead singer.

We use Permutations here because order of selecting the singers matters.

The number of permutations of selecting r things out of n things = $^nP_r=\dfrac{n!}{(n-r)!}$

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$=\dfrac{12\times11\times10!}{10!}=132$

Hence, the director can choose first a lead singer and then a stand-in for the lead singer in 132 ways.

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