3 years ago

Amanda found the equation 10x+5y=20 in the “linear equations” chapter of her math book.

Mathematics

1 answer:

Sav [38]3 years ago

4 0

Answer:

Amanda found the equation 10x+5y=20 in the “linear equations” chapter of her math book.

Step-by-step explanation:

Amanda found the equation 10x+5y=20 in the “linear equations” chapter of her math book.

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g At a certain gas station, 30% of all customers use the restroom. What is the probability that, out of the next 10 customers, (

Kruka [31]

Answer:

$P(x=4) = 0.200$

Step-by-step explanation:

Given

$n=10$ --- selected customers

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

$p =30\% = 0.30$ --- proportion that uses the restroom

Required

$P(x = 4)$

The question illustrates binomial probability and the formula is:

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

So, we have:

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

$P(x=4) = ^{10}C_4 * (0.30)^4 * (0.70)^6$

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$P(x=4) = 0.200$

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