Answer
See below
Work Step by Step
The probability of tossing a coin 30 times and getting 4 heads can be found by applying $P(X=4)=_nC_k p^k (1-p)^{n-k}\\=_{30} C_4 0.5^4(1-0.5)^{30-4}\\=\frac{30!}{(30-4)!.4!}\times0.5 ^{30}\\=2.55 \times10^{-5}$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 11 Data Analysis and Statistics - 11.2 Apply Transformations to Data - 11.2 Exercises - Mixed Review - Page 755: 30
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