Binomial random variable

[sonney32]

Let x be a binomial random variable with n = 10 and p = .4 Find the values of


P(x?4)


E(x)=np

I am not even sure where to start, if someone could give me some examples.
Thanks

 

[tkhunny]

Time out!! If you cannot do the second one, please get out of this class and re-register for pre-algebra.

For the first, p(x>=4) = 1 - [p(0) + p(1) + p(2) + p(3)]

RBGTHGANH