The probability that a patient recovers from a stomach disease is 0.8. If 20 people are known to have contracted this disease, then the probability that exactly 10 recover is: a. 0.003 b. 0.022 c. 0.002 d. 0.032
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Step 1: Calculate the value of nCx (20 choose 10): \[20C10 = \frac{20!}{10!(20-10)!} = \frac{20 \times 19 \times 18 \times 17 \times 16 \times 15 \times 14 \times 13 \times 12 \times 11}{10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 Show more…
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