Question
Tue April 15, 2014 By: Aakanksh Ravi

An experiment suceeds thrice as often as it fails. find the probability that in next 5 trials, there will be atleast 3 successes

Expert Reply
Wed April 16, 2014
This problem is based on Binomial Distribution.
Let x = getting success
According to given condition, an experiment succeeds thrice as often it fails.
Thus, we have
 
p equals 3 over 4 comma space q equals 1 fourth space a n d space n space equals space 5
Error identifier "subscript" not found in transformation rule: SINGLEPOSTSCRIPT
Thus, P(at least 3 successes) = P(X = 3) + P(X = 4) + P(X = 5)
 
Error identifier "subscript" not found in transformation rule: SINGLEPOSTSCRIPT
 
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