Question

An urn contains 10 red balls, 20 yellow balls, and 30 orange balls. If you reach into the urn and select a single ball at random, what is the probability of selecting a yellow ball? State your answer as a fraction.

Answer 1

the probability of selecting yellow ball is 1/3

Explanation:

Number of red balls = 10

number of yellow balls = 20

number of orange balls = 30

Total balls in the urn = 10 + 20 + 30 = 60

Probability of selecting a yellow ball = Pr(Y)

$Pr(Y)\text{ = }\frac{number\text{ of yellow balls}}{\text{Total balls}}$$\begin{gathered} Pr\text{ (Y) = }\frac{20}{60} \\ Pr\text{ (y) = 2/6 = 1/3} \end{gathered}$

Hence, the probability of selecting yellow ball is 1/3