Ans : Given the discrete probability distribution for x= 1,2,3,4,5
x | P(x) |
1 | 5/15 |
2 | 4/15 |
3 | 3/15 |
4 | 2/15 |
5 | 1/15 |
Total | 1 |
from the definition of expected value of a discrete probability distribution is
Let X is a discrete random variable then expected value of is given by
from the given problem
E(x) = 1*(5/15)+ 2*(4/15) + 3*(3/15) +4*(2/15) + 5*(1/15)
E(x) = 2.3333
expected value of a discrete probability distribution is 2.3333
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