A citrus farmer has observed the following distribution for the number of oranges per tree.

Oranges	25	30	35	40
Probability	.10	.40	.30	.20

If you were to calculate the mean (expected value) of oranges per tree, what is the correct calculation?

A.25(0.10)+30(0.40)+35(0.30)+40(0.20)25(0.10)+30(0.40)+35(0.30)+40(0.20)

B. .10+.40+.30+.204.10+.40+.30+.204

C. 25(0.10)4+30(.40)3+35(0.3)2+40(0.2)25(0.10)4+30(.40)3+35(0.3)2+40(0.2)

D. 25(0.10)+30(0.40)+35(0.30)+40(0.20)425(0.10)+30(0.40)+35(0.30)+40(0.20)4

E. 25+30+35+404