The Probability That a Call to an Emergency Help Line

Multiple Choice

The probability that a call to an emergency help line is answered in less than 10 seconds is 0.8.Assume that the calls are independent of each other.Using the normal approximation for binomial with a correction for continuity, the probability that at least 75 of 100 calls are answered within 10 seconds is approximately _______

A) 0.8
B) 0.1313
C) 0.5235
D) 0.9154
E) 0.8687