Question

Tossing a thumb tack has a 25% probability of landing point up on any one trial. What’s the probability of getting 5 OR LESS out of 15?

Answer 1

Answer:

If a thumbtack is dropped, the probability of it landing point up is .4. If 12 tacks are dropped, find the probability of at least 9 points up in fraction form

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Binomial Problem with n = 12; p(up) = 0.4 ; p(other) = 0.6

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P(9<= x <=12) = 1 - binomcdf(12,0.4,8) = 0.0153 = 153/10000

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Cheers,

Stan H.

Step-by-step explanation:

P(9<= x <=12) = 1 - binomcdf(12,0.4,8) = 0.0153 = 153/10000

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Cheers,

Stan H.