A die is rolled twenty times and the number of twos that come up is tallied. Find the probability of getting exactly five twos.
Answer is 0.129.
Answer is 0.129.
i am not sure that it is gmat problemDeljef18 wrote:A die is rolled twenty times and the number of twos that come up is tallied. Find the probability of getting exactly five twos.
Answer is 0.129.
but to me the answer looks like
(5/6)^15*(1/6)^5*(20!/(15!*5!))
if my reasoning is correct it is impossible to solve with time constrains
