A discrete probability distribution for a random variable X is given. Use the given distribution to find the requested information.Find E(X).
A. 1.22
B. 1.42
C. 1.52
D. 1.32
Answer: D
Mathematics
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Decide whether the following is an expression or an equation. If it is an expression, simplify it. If it is an equation, solve it.
A. Equation; 7
B. Expression; x + 7
C. Expression; 
D. Equation; 10
Mathematics
Find the value of the determinant.
A. 31 B. 41 C. -41 D. -29
Mathematics
Solve the equation.2x(x - 7)= 0
A. 2, 7 B. 0, -7 C. 0, 7 D. 0, 2, -7
Mathematics
Round the whole number to the given place.A publishing company sold 18,268,591 books in 2000. Round the number of books sold to the nearest ten-million.
A. 18,000,000 B. 18,270,000 C. 10,000,000 D. 20,000,000
Mathematics