Solve the problem.A continuous random variable X has PDF f(x) = 
x(8 - x), 
Find the variance of the random variable X.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Subtract.
- 
A. - 
B. 
C. 
D. - 
Mathematics
Solve the equation.-6x = -36
A. -30 B. 6 C. 30 D. 2
Mathematics
Solve the problem. Use a Venn diagram to find your answer.The subsets A, B, and C of the universe U satisfy the following conditions:n(A ? B ? C) = 165n(A ? B ? C) = 22n(A ? B) = 46n(A ? C) = 43n(B ? C) = 41n(A) = 111n(B) = 82n(C) = 80n(U) = 165Find n(
? B ? C).
A. 18 B. 21 C. 19 D. 20
Mathematics
Refer to the figure in which AB ll CD. Answer true or false.
1. AD ll BC
2. m
4. AB ? BC
Mathematics