A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds. The fitness association wants to recognize the fastest 10% of the boys with certificates of recognition. What time would the boys need to beat

in order to earn a certificate of recognition from the fitness association?

A) 511.2 seconds B) 525.8 seconds C) 394.2 seconds D) 408.8 seconds

D