SOLUTION: there are 15 boys and 13 girl in a maths class. the mean time spent on homework each week for the boys is 5.5 hours. the mean time spent on the girls homework is 7.2 hours. Find th

Algebra ->  Probability-and-statistics -> SOLUTION: there are 15 boys and 13 girl in a maths class. the mean time spent on homework each week for the boys is 5.5 hours. the mean time spent on the girls homework is 7.2 hours. Find th      Log On


   

Question 969866: there are 15 boys and 13 girl in a maths class. the mean time spent on homework each week for the boys is 5.5 hours. the mean time spent on the girls homework is 7.2 hours. Find the mean time spent on homework for all students in the class.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
there are 15 boys and 13 girl in a maths class.
the mean time spent on homework each week for the boys is 5.5 hours.
the mean time spent on the girls homework is 7.2 hours.
Find the mean time spent on homework for all students in the class.
:
One way to do this is, there are 28 in the class.
A = %28%2815%285.5%29%2B13%287.2%29%29%29%2F28
A = %28%2882.5%2B93.6%29%29%2F28
A = 176.1%2F28
A = 6.29 hrs