Question

1. Heather has a very important exam to take in the morning. Since she wants to be sure that she will wake up in time, she sets two alarm clocks. One has a .95 probability that it will ring, and the other has a .98 probability that it will ring. She sets both clocks. What is the probability that at least one of the alarm clocks will wake her up?
A. 0.9025
B. 0.9310
C. 0.9604
D. 0.9800
E. 0.9990

Answer 1

The correct answer for the question that is being presented above is this one: "C. 0.9604." The probability that at least one of the alarm clocks will wake her up is 0.9604. Heather has a very important exam to take in the morning. Since she wants to be sure that she will wake up in time, she sets two alarm clocks.