Question

a jar contains 8 marbles marked with the numbers 1 through 8. you pick a marble at random. what is the probability of not picking the marble marked with the number 5? enter your answer as a simplified fraction.

the probability of not picking the marble marked with the number 5 is .

Explanation:

Step1: Total marbles count

Total number of marbles = 8

Step2: Favorable outcomes for not picking 5

Number of marbles that are not 5 = $8 - 1 = 7$

Step3: Calculate probability

Probability = $\frac{\text{Number of favorable outcomes}}{\text{Total outcomes}} = \frac{7}{8}$

Answer:

$\frac{7}{8}$