Question: Can you explain this one question to me please. Question 4 0 out of 10 points We have two random variables, A and B. A

Can you explain this one question to me please.

Question 4 0 out of 10 points We have two random variables, A and B. A has a mean of 57.4 and a standard deviation of 21.2. B has a mean of 28.9 and a standard deviation of 19.7. If we create a new random variable C, defined as C= A + B, what is the standard deviation of C? Enter your answer as a decimal to one decimal place

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