Answer
Let A = I play in wet sand
and B = My friend swim, then
P(AUB) = P(A) + P(B) - P(A ∩ B)
= 0.006 + 0.007 - (0.006 x 0.007)
= 0.0130
We need to assume that A and B are independant events
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 3.63 - 3.97 - Applying the Concepts - Intermediate - Page 147: 3.83
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