Question

x=1,3,4,5,10

P(X=x)= 0.30, 0.20, 0.10, 0.15, 0.25

Question:

a. What is the range of the variable x?

b. What is P(3<X≤10)

c. What is P(X≥3)

Answer 1

a. Range of the variable x: 10-1=9.

b. $P(3<X\le10)=0.10+0.15+0.25=0.50.$

c. $P(X\ge3)=1-0.30=0.70.$