Concept explainers
In Exercises 1–22, use the normal curve to approximate the probability.
An experiment consists of 25 binomial trials, each having probability 1/5 of success. Use an approximating normal curve to estimate the probability of
(a) exactly 5 successes.
(b) between 3 and 7 successes, inclusive.
(c) less than 10 successes.
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