Jimenezmiranda
10.07.2019 •
Mathematics
Assume that a researcher randomly selects 14 newborn babies and counts the number of girls selected, x. the probabilities corresponding to the 14 possible values of x are summarized in the given table. find the probability of selecting exactly 4 girls..
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Ответ:
P(X = k) = (nCk) p^k (1–p)^(n-k)
So, P(X = 0) = (14C0) • 0.5^0 • (1–0.5)^(14-0) = 0.000
P(X = 1) = (14C1) • 0.5^1 • (1–0.5)^(14–1) = 0.001
And so on.
Thus, P(X = 4) = (14C4) • 0.5^(4 • (1–0.5)^(14–4) = 0.061
So the probability of selecting exactly 4 girls is 0.061.
Ответ:
69000
Step-by-step explanation: 1 kilo= 1,000 dec
69x1,000=69,000 it's basically like counting 1,000 decimeters 69 times