The Actual Number of Hours That a Candle Will Burn

question 21

Multiple Choice

The actual number of hours that a candle will burn has an approximate normal distribution with a mean of 18 hours and a standard deviation of 1.2 hours. What is the probability that the candle will burn for Less than 15.6 hours? Give your answer as a percentage.

• A) 2.5%
• B) 5%
• C) 16%
• D) 95%
• E) None of the above.