Question

there are 20 marbles in a bag: 8 pink marbles, 3 yellow marbles, and 9 teal marbles. if one of these marbles is selected at random, what is the probability of selecting a pink marble? (express your answer as a decimal or fraction, not as a percent.)

Explanation:

Step1: Recall probability formula

The probability formula is $P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$.

Step2: Identify values

The total number of marbles is 20. The number of non - pink marbles is $3 + 9=12$.

Step3: Calculate probability

$P(\text{not pink})=\frac{12}{20}=\frac{3}{5}=0.6$

Answer:

$0.6$ or $\frac{3}{5}$