3 years ago

Teo spins the spinner 120 times. He expects to land on one particular color 30 times. What color is it?

Mathematics

1 answer:

olasank [31]3 years ago

8 0

Answer:

Red

Step-by-step explanation:

P = 30/120 = 1/4

The spinner is divided into 8 equal sections. 1/4 of 8 is 2. So we're looking for a color that appears on exactly 2 of the sections.

The color is red.

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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, (

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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

$P(x = 4)$

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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Step-by-step explanation:

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A counter example disproves a statement.

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