SOLUTION: The probability that an individual is left- handed is 0.11. In a class of 40 students, what is the probability of finding exactly five left-handers students?

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Question 1205246: The probability that an individual is left- handed is 0.11. In a class of 40 students, what is the probability of finding exactly five left-handers students?
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


Straightforward binomial probability, but the calculations are ugly. So use a calculator (hand-held or online).

5 of the 40 are left-handed, each with probability 0.11; the other 35 are right-handed, each with probability 1-0.11 = 0.89:

%28C%2840%2C5%29%29%28%280.11%29%5E5%29%28%280.89%29%5E35%29

0.1794 correct to 4 decimal places, if I punched the numbers in right