Answer
Let E = Internet user with Wireless connection
and F = He uses twitter, so
P(E|F) = P(E ∩ F) / P(F)
0.25 = P(E ∩ F) / 0.54
P(E ∩ F) = 0.25 x 0.54
= 0.135
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 - Basic - Page 146: 3.80
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