Question

a marble is randomly drawn from a bag that with 5 blue marbles, 8 red marbles, and 7 green marbles. event a: red event b: blue p(a or b) = ? hint: p(a or b) = p(a) + p(b) round your answer to the nearest hundredth.

Explanation:

Step1: Calculate total marbles

Total = 5 + 8 + 7 = 20

Step2: Find P(A)

P(A) = $\frac{8}{20}$ = 0.4

Step3: Find P(B)

P(B) = $\frac{5}{20}$ = 0.25

Step4: Compute P(A or B)

P(A or B) = 0.4 + 0.25 = 0.65

Answer:

0.65