Concept explainers
(a) Try to use both the binomial probability formula and the normal approximation to the binomial to calculate the probability that exactly half of the coins come up heads if the following number of coins are flipped. You may run into problems using the binomial probability formula for part (iii).
(i) 10
(ii) 100
(iii) 1000
(b) If you ran into problems using the binomial probability formula for part (iii), tell what happened and explain why it happened.
(c) Someone might speculate that with more coins, the probability that exactly half are heads goes up with the number of coin flips. Based on the results from part (a), does this happen? Explain the error in the speculation.
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Chapter 9 Solutions
Finite Mathematics and Calculus with Applications (10th Edition)
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