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X and Y are independent random variables. X has mean 100 and standard deviation 12. Y has mean 30 and standard deviation 9. What are the mean and standard deviation of (X–Y)?

X and Y are independent random variables. X has mean 100 and standard deviation 12. Y has mean 30 and standard deviation 9. What are the mean and standard deviation of (X–Y)?
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2 votes
X and Y are independent random variables. X has mean 100 and standard deviation 12. Y has mean 30 and standard deviation 9. What are the mean and standard deviation of (X–Y)?

asked
User Vishnu Mishra
by
8.4k points

1 Answer

2 votes

Answer:

x is down and up and y is up then down

Explanation:

I think

answered
User Derrek
by
7.9k points
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