Question

The table shows the probability distribution for the number of people who contract a disease in a scientific study. Find the expected number of people who contract the disease. Round your answer to the nearest tenth.

Number of People: 2 Probability: 0.20
Number of People: 3 Probability: 0.32
Number of People: 4 Probability: 0.288
Number of People: 5 Probability: 0.1536
Number of People: 6 Probability: 0.0384

Answer 1

A) 3.5
B) 2.5
C) 4.0
D) 3.0

Answer 2

all you have to do is multiply the probability by the number of people and add up the sum

Answer 3

so.... (2)(.2)+(3)(.32)...... all the way to 6... do you know what im saying

Answer 4

Yeah, I got it now.. Thank you! :)

Answer 5

welcome. anytime :-)