Question

A spinner has the numbers 1 to 4 on it.

Probability of spinning 4 is 0.1
Probability of spinning 1 is 0.6
Probability of spinning 2 is the same as 3.

What is the probability of spinning a number 3?

Answer 1

Hello,

P(1)+P(2)+P(3)+P(4)=0.6+2P(2)+0.1=1
==>2P(2)=1-0.6-0.1
==>2P(2)=0.3
P(2)=P(3)=0.15