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XodoX
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Homework Statement
A biased coin is tossed ten times. Suppose that the probability of getting heads on a single toss is p. Let X be the number of heads obtained.
a)Give an algebraic formula for the probability mass function of X.
b) What do you think E[X] should be.
Homework Equations
The Attempt at a Solution
No idea. The probability mass function for a discrete random variable is:
pX(x)=Pr(X=x) for all x
I suppose that's what they want for a), but one for this example ? No idea about b), either. It's a biased coin toss. How am I supposed to find this out here? Otherwise, it would be E[X]=0.5