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zmey [24]
3 years ago
12

What is the area of the trapezoid below?

Mathematics
1 answer:
Softa [21]3 years ago
3 0

Answer:

B

Step-by-step explanation:

Hope this helps! have a great day!

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The average age of all students at a certain college is 22 years and the standard deviation is 2 years. What is the probability
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Answer:

The probability that the average age of a randomly selected sample of 100 students will be less than 21.8 years is 0.159

Step-by-step explanation:

According to the given data we have the following:

mean = μ= 22

standard deviation = σ = 2

n = 100

μx = 22

σx=σ/√n=2/√100=0.2

Therefore, P( x < 21.8)=P(x-μx)/σx<(21.8-22)/0.2

=P(z<-1)

= 0.159

The probability that the average age of a randomly selected sample of 100 students will be less than 21.8 years is 0.159

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