alishacherevko alishacherevko

17-12-2021
Mathematics

contestada

What is the expected value of X?

X 3 4 5 7 9
P 0.2 0.1 0.25 0.05 0.4

6.2
6.05
5.95
5.6

Respuesta :

LammettHash LammettHash

17-12-2021

Multiply each X by its corresponding probability P, then add up them up.

E[X] = 3•0.2 + 4•0.1 + 5•0.25 + 7•0.05 + 9•0.4

⇒ E[X] = 6.2

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