Question

Help asap pleeaasssseeeeee

Answer 1

B. 30.47.

Explanation:

E(X) = 23*0.16 + 25*0.09 + 26*0.18 + 31*0.12+ 34*0.24+38*0.21

= 30.47.

Answer 2

B. 30.47

Explanation:

The mean for a discrete random variable when the probability distribution is given is calculated by the formula:

E(X) = ∑(x_i)*P(x_i)

So, from the values given in the table

`E(X) = (23)(0.16) + (25)(0.09)+(26)(0.18)+(31)(0.12)+(34)(0.24)+(38)(0.21)\\= 3.68+2.25+4.68+3.72+8.16+7.98\\= 30.47`

Hence, the correct answer is:

B. 30.47 ..