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3 years ago

11

In the locker room, there are 8 rows of 9 lockers. All lockers were full in the morning, but in the afternoon 6 were empty. How

many lockers were full in the afternoon?

1 answer:

anastassius [24]3 years ago

6 0

Answer:

66

Step-by-step explanation:

The total number of lockers that were full in the morning was 72. Since 6 were empty in the afternoon, 72-6 = 66 full lockers

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Solution to the problem

Let X the random variable of interest, on this case we now that:

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The probability mass function for the Binomial distribution is given as:

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And replacing we got:

$P(x \geq 6)=P(X=6)+P(X=7)= 0.358+0.517=0.875$

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