Give the mean of the following probability distribution?
A) 0.25
B) 1.28
C) 2.85
D) 3.50

Question

Give the mean of the following probability distribution? 
A) 0.25 
B) 1.28 
C) 2.85 
D) 3.50

Quizplus · Accepted Answer

To find the mean of a discrete probability distribution, we multiply each possible outcome by its probability and add up the products.

For this distribution, we have:

Mean = (0)(0.10) + (1)(0.20) + (2)(0.40) + (5)(0.30)
Mean = 0 + 0.2 + 0.8 + 1.5
Mean = 2.5

Therefore, the best choice is C, as it is the closest to the calculated mean of 2.5.

Give the Mean of the Following Probability Distribution