Find the expected value for the random variable x having this probability 
a = 3 b = 4c = 5 d = 6
A. 3.9
B. 4.5
C. 3.6
D. 5
Answer: D
You might also like to view...
Supply the missing numbers. Round decimals to the nearest thousandth and percents to the nearest tenth of a percent.fractiondecimalpercent?4%
A.
 ? | 0.04 |
B.
 ? | 0.4 |
C.
 ? | 0.4 |
D.
 ? | 0.04 |
Replace the polar equation with an equivalent Cartesian equation.r2 = 24r cos ?
A. x = 24 B. (x - 12)2 + y2 = 0 C. (x - 12)2 + y2 = 144 D. x2 + (y - 12)2 = 144
Find a matrix A and a column matrix B that describe the following tables involving credits and tuition costs. Find the matrix product AB, and interpret the significance of the entries of this product.
?
A.
AB =
Tuition for Student 1 is $1210, tuition for Student 2 is $1273, and tuition for Student 3 is $832.
B.
AB = 
College A costs $937 and College B costs $1140.
C.
AB = 
College A costs $892 and College B costs $1026.
D.
AB = 
Tuition for Student 1 is $1200, tuition for Student 2 is $1243, and tuition for Student 3 is $827.
Solve the problem.Marty's Tee Shirt & Jacket Company is to produce a new line of jackets with an embroidery of a Great Pyrenees dog on the front. There are fixed costs of $620 to set up for production, and variable costs of $38 per jacket. Write an equation that can be used to determine the total cost, C(x), encountered by Marty's Company in producing x jackets.
A. C(x) = 620 - 38x B. C(x) = 620 + 38x C. C(x) = (620 + 38) x D. C(x) = 620x + 38