Answer
Given
P(1) = P(2) = P(3) = P(4) = P(5) = 1/20
P(6) = P(7) = P(8) = P(9) = P(10) = 3/20
P(A) = P(4) + P(5) + P(6) = 1/20 + 1/20 + 3/20 = 5/20 = 1/4
P(B) = P(6) + P(7) = 3/20 + 3/20 = 6/20
Work Step by Step
As given in answer
Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 3 - Probability - Exercises 3.1 - 3.34 - Learning the Mechanics - Page 119: 3.10b
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