wait wait...i'm sleeping. You don't need the bloody binomial theorem..... hhhaha.....
what is P(n<=7)?
its the same as a failure in the first 7 trials....which is (1-p)^7
so you don't need any fancy smansy combinatorics here.... and there's also the problem of computing 100!......
for many problems of this type, the complement is your goooood friend...
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