4 years ago

Three more than three times a number is 72. Find the number

Mathematics

1 answer:

puteri [66]4 years ago

7 0

Answer:

Step-by-step explanation:

3x+3=72

3x=72-3

3x=69

x=23

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Answer:

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Step-by-step explanation:

Given

$n=10$ --- selected customers

$x = 4$ --- those that are expected to use the restroom

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Required

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$P(x) = ^nC_x * p^x * (1 - p)^{n - x}$

So, we have:

$P(x=4) = ^{10}C_4 * (0.30)^4 * (1 - 0.30)^{10 - 4}$

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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