Question 1041973
If the first test is correct 57% of the time, and the second is correct 60% of the time, and they are both correct 55% of the time, then the chance that at least one is correct is 62% of the time.
57+60-62=55
57+60-55=62
The chance that they are both correct is .55, or 55%.   ☺☺☺☺