you win a game if you roll a die and get a 2 or 5 you play 60 times what is the probability you will win the game at least 40 times---
i know that is a cumulative probability
i know that 60 *.333=19.98
i know that the answer for winning 15 out of the 60 times because the book includes some answers and that answer is 20---
i know when i do it on a binomial calculator that is at stattrek.com it gave me the cumulative as 1.32
also when i did it by the number of successes which in this case is 40 so i did 40*.333=13.32
so i am still confused as to which probability is the right one--

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i got my .333 when i did (1/6)+(1/6)

can someone tell me if i got the right probability in there somewhere

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