From a Portion of a Probability Distribution, You Read That

Multiple Choice

From a portion of a probability distribution, you read that P(demand = 1) is 0.05, P(demand = 2) is 0.15, and P(demand = 3) is .20. The cumulative probability for demand = 3 would be which of the following?

A) 0.133
B) 0.200
C) 0.400
D) 0.600
E) Cannot be determined from the information given.