3 years ago

ANYONE GOOD AT HISTORY!?

Mathematics

1 answer:

marishachu [46]3 years ago

3 0

Answer:

BRAINLIEST PLSSS

Step-by-step explanation:

im good

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C. 0.98

Step-by-step explanation:

Let x be the mean of Company A and B annual profit and x/2 and y are standard deviation of Company A and B annual profit.

P(B<0) = 0.9*P(A<0)

P(Z<(0-x)/y) = 0.9*P(Z<(0-x)/(x/2))

P(Z<-x/y) = 0.9*P(Z<-2)

P(Z<-x/y) = 0.0205

x/y =2.04

Or y/x = 1 /2.05

y/x =0.49

Ratio of the standard deviation of company B annual profit to the standard deviation of company A annual profit =y/(x/2)

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Answer:

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There are 25 students in a class. 20% of the the students are in a club. How many students are in a club?

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Step-by-step explanation:

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$25 * \frac{20}{100}$

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