For boys, the average number of absences in the first grade is 15 with a standard deviation of 7; for girls, the average number of absences is 10 with a standard deviation of 6.

In a nationwide survey, suppose 100 boys and 50 girls are sampled. What is the probability that the male sample will have *at most* three more days of absences than the female sample?

(A) 0.025

(B) 0.035

(C) 0.045

(D) 0.055

(E) None of the above

Subject | Mathematics |

Due By (Pacific Time) | 10/21/2015 09:00 pm |

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