Either exam 1, 2 or 3 will be generally curved. The probability of curving exam

Question

Either exam 1, 2 or 3 will be generally curved. The probability of curving exam 1 is 0.31 and the probability for curving exam 3 is 0.5. What is the probability of curving exam 2?
A: 0.33 B: 0.5 C: 0.81 D: 0.19
Please show work Either exam 1, 2 or 3 will be generally curved. The probability of curving exam 1 is 0.31 and the probability for curving exam 3 is 0.5. What is the probability of curving exam 2?
A: 0.33 B: 0.5 C: 0.81 D: 0.19
Please show work
A: 0.33 B: 0.5 C: 0.81 D: 0.19
Please show work

Explanation / Answer

probability of curving exaam 1 +probability of curving exaam 2+probability of curving exaam 3 = 1

probability of curving exaam 1 = 0.31

probability of curving exaam 3 = 0.5

probability of curving exaam 2 = 1- probability of curving exaam 1- probability of curving exaam 3

= 1- 0.31-0.5 = 0.19 (D)

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