The random variable X is the size in GB of a flash drive sol

The random variable X is the size (in GB) of a flash drive sold at a computer store. The probability mass function of X is x 1 2 4 8 16 p(x) 0.05 0.10 0.35 0.40 0.10 The value of the cdf of X evaluated at x = 6 is A: F(6) = 0.70 B: F(6) = 0.50 C: F(6) = 0.35 D: F(6) = 0.90 E: F(6) = 0

Solution

F(6) = P(X < = 6)

= P(X = 1) + P(X = 2) + P(X = 4)

= 0.05 + 0.1 + 0.35

= 0.5