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FromTheMoon [43]

2 years ago

6

Yoko earns 1.5 times her normal hourly pay for each hour that she works over 40 hours in a week. Her normal pay is $9.20 per hou

r. Last week Yoko earned $395.60. How many hours did she work last week?

1 answer:

kogti [31]2 years ago

6 0

You divide $9.20 into $395.60 and get 43 hours.

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Answer:

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Step-by-step explanation:

Given

Let

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So, we have:

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$r = 4$ --- students to select

Required

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From the question, we understand that 2 undergraduates are to be selected; This means that 2 graduates are to be selected.

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So, we have:

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$Total = \frac{8!}{4!4!}$

Using a calculator, we have:

$Total = 70$

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$U = ^3C_2$

$U = \frac{3!}{(3-2)!2!}$

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$U = 3$

The number of ways of selecting 2 from 5 graduates is:

$G = ^5C_2$

$G = \frac{5!}{(5-2)!2!}$

$G = \frac{5!}{3!2!}$

$G =10$

So, the probability is:

$Pr = \frac{G * U}{Total}$

$Pr = \frac{10*3}{70}$

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$Pr = 0.4286$

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