The expected value of the following probability distribution is _________.

X_I_ 1, 5, 10, 20, 50,

p_i 0.30, 0.40 0.10, 0.15, 0.05

0.30(1)+0.40(5)+0.10(10)+0.15(20)+0.05(50)=8.8

8.8 is my answer, thanks for checking. list of possible answer are -

1. 17.5

2. 8.8

3. 7.5

4. 6.4