Question

5. Twenty five percent of American ages 25 to 74 have high blood pressure. If 10 are randomly selected, find each probability.

a. Exactly 6 will have high blood pressure.

b. At least 8 will have high blood pressure.

Answer 1

Use excel formula "=BINOM.DIST(x, n, p, FALSE)"

x	Excel formula	P(X=x) [rounded to four decimal places]
6	=BINOM.DIST(6, 10, 0.25, FALSE)	0.0162

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Use excel formula "=BINOM.DIST(x, n, p, FALSE)"

x	Excel formula	P(X=x) [rounded to four decimal places]
8	=BINOM.DIST(8, 10, 0.25, FALSE)	0.0004
9	=BINOM.DIST(9, 10, 0.25, FALSE)	0.0000
10	=BINOM.DIST(10, 10, 0.25, FALSE)	0.0000