[PPSC LECTURER MEDICAL LAB TECHNOLOGY, 2024]

29. The probabilities that a student will receive an A, B or C grade are 0.50, 0.28, and 0.22 respectively. What is the probability that the student will receive at least B grade?

1. 0.28

2. 0.78

3. 0.50

4. 0.39

Correct Answer :

0.78