3 years ago

At the book store books selling for 15$ are marked 10% off what is the discount? what is the sale price of each book

1 answer:

3 0

The saleprice is $13.5, so the discount is $1.5.

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bonufazy [111]

(-5C^2)^3-(5c)^6
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lions [1.4K]

Answer:

0.8213

Step-by-step explanation:

-This is a binomial probability problem given by the function:

$P(X=x)={n\choose x}p^x(1-p)^{n-x}$

Given that n=21 and p=0.2, the probability that she experience a delay on at least 3 days is calculated as:

$P(X=x)={n\choose x}p^x(1-p)^{n-x}\\\\P(X\geq 3)=1-P(X$

Hence, the probability that she experience delay on at least 3 days is 0.8213

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horrorfan [7]

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Dafna1 [17]

-5 + -40 + -50 = -5 + 8 + 10
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