Question

there are 4 blue balls and 5 red balls in bag. kenny picks one out of the bag at random. what is the probability that it is blue?

Explanation:

Step1: Calculate total number of balls

Total number of balls = number of blue balls + number of red balls. So, \(4 + 5=9\) balls.

Step2: Use probability formula

Probability of an event \(P(E)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}\). Here, number of favorable outcomes (blue balls) is \(4\), total number of outcomes (total balls) is \(9\). So, \(P(\text{blue})=\frac{4}{9}\)

Answer:

\(\frac{4}{9}\)