X: 0 1 2 3 4

p (x) : 0.1 0.6 0.05 0.15 0.1

Geraldine surveyed her school to find the number of siblings that they had. She created a probability distribution which is displayed in the table. What is the average number of siblings for students in the school?

A) 1 sibling

B) 1.5 siblings

C) 2 siblings

D) 2.5 siblings

Question

Mathematics

Aron Mcbride

Today, 05:38

X: 0 1 2 3 4

p (x) : 0.1 0.6 0.05 0.15 0.1

Geraldine surveyed her school to find the number of siblings that they had. She created a probability distribution which is displayed in the table. What is the average number of siblings for students in the school?

A) 1 sibling

B) 1.5 siblings

C) 2 siblings

D) 2.5 siblings

+5

Answers (2)

Know the Answer?

Van · Answer 1

The answer is B) 1.5

To find the expected number of siblings, multiply each outcome by the probability of the outcome (0) (0.1) + (1) (0.6) + (2) (0.05) + (3) (0.15) + (4) (0.1) = 1.55 OR 1.5 siblings.

Joanna · Answer 2

The answer you are looking for is 1.5 siblings.