Sample Response: The complementary event for choosing a red marble is choosing a blue or purple. The total number of marbles is 5. The probability of choosing a red marble is 1/5, and the complement would be 4/5. That is not the same as choosing a blue marble. Complementary events must have a sum of 1. Which of the following did you include in your response? Check all that apply.No, the probability of choosing a red marble is not the complement of choosing a blue marble.P(red) + P(blue) = 3/5, n
Answer
A
No, the probability of choosing a red marble is not the complement of choosing a blue marble.
B
P(red) + P(blue) = 3/5, not 1.
C
The number of blue and red marbles does not add to the total number of outcomes.
D
There are other marbles besides red ones and blue ones.