Consider the following probability distribution of the random variable X.
x |
2 |
4 |
6 |
8 |
10 |
12 |
P(Y = x) |
0.05 |
0.15 |
0.25 |
A |
0.05 |
0.25 |
State the value of A to two digits to the right of the decimal point.
Solution :
P(y=x)=1
=0.05+0.15+0.25+A+0.05+0.25=1
=0.75+A=1
A=1-0.75=0.25
A=0.25
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