The cumulative distribution function F(x) of a random variable X is given in the
following table:
х
F(x)
1
0.1
2
a
3
b
4
1
Let a and b are positive constants. If P(2 < X < 4) = 0.5, and P(X > 3) =
0.2. Then a and b equal to:
a=0.1, b=0.3
None of these
a=0.5, b=0.8
a=0.1, b=0.7