SOLUTION: if the probabilities of hitting a target is 1/6 and twelve shots are fired independently: 1. what is the probability of the target being hit at least twice ? 2. find the conditi

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Question 862862: if the probabilities of hitting a target is 1/6 and twelve shots are fired independently:
1. what is the probability of the target being hit at least twice ?
2. find the conditional probability that the target is hit at least twice, assuming that at least one hit is scored?
3. what is the expected number of shots that will miss the target and the standard deviation?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

p(hitting target) = 1/6,  n = 12

1. P(x  ≥  2) = 1 - binomcdf(12, 1/6,1)

2, P(x = 1) = binompdf(11, 1/6, 1)

3. E = %281%2F6%2912+=+2, s = sqrt%282%285%2F6%29%29