The probability of hitting the target with one shot is 0.7 and does not depend on the number of the shot.
April 9, 2021 | education
| The probability of hitting the target with one shot is 0.7 and does not depend on the number of the shot. Find the probability that with 5 shots there will be exactly 3 hits on the target.
The probability of hitting with one shot is p = 0.7.
The probability of a miss q = 1 – p = 1 – 0.7 = 0.3;
According to Bernoulli’s formula, the probability of hitting 3 times with 5 shots will be equal to:
P = C (5,3) * p ^ 3 * q ^ 2;
C (5,3) is the number of combinations of them 5 to 3.
C (5,3) = 5! / (3! * (5 – 3)!) = 5 * 4 / (1 * 2) = 10.
The probability that there will be 3 hits for 5 shots:
P = 10 * 0.7 ^ 3 * 0.3 ^ 2 = 10 * 0.343 * 0.09 = 0.3087.
Answer: The probability that there will be exactly 3 hits is 0.3087.
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