Expected number and standard deviation

I have absolutely no idea even how to set this one up. If somebody could please help me I would greatly appreciate it. Thanks.

Assume that in Fizzo-Cola's new bottle cap game, the probability that a bottle will have a winning bottle-cap is 0.25. Suppose you buy 9 bottles of Fizzo-Cola.

A) Find the expected number of winning Fizzo-Cola bottle-caps.

B) Find the standard deviation of the number of winning Fizzo-Cola bottle-caps.

glenn said:

Assume that in Fizzo-Cola's new bottle cap game, the probability that a bottle will have a winning bottle-cap is 0.25. Suppose you buy 9 bottles of Fizzo-Cola.
A) Find the expected number of winning Fizzo-Cola bottle-caps.
B) Find the standard deviation of the number of winning Fizzo-Cola bottle-caps.

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This is a binomial distribution.
The expected number is \(\displaystyle pN\) and standard deviation is \(\displaystyle \sqrt{p(1-p)N}\)

so it is 0.25*9?

glenn said:

so it is 0.25*9?

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Well in this question \(\displaystyle p=0.25~\&~N=9\) what do you think?

lol sorry...thanks, im just not a big statistics person i have a hard time with this stuff