The mean weight of 150 students in a class is 60 kg. The mean weight of boys in the class is 70 kg. and that of the girls is 55 kg. Find the number of girls in the class. Solution :
The mean weight of 150 students in a class is 60 kg. The mean weight of boys in the class is 70 kg. and that of the girls is 55 kg. Find the number of girls in the class. Solution :
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter3: Solving Equation And Problems
Section3.7: Costs, Income, And Value Problems
Problem 8P
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Transcribed Image Text:The mean weight of 150 students in a class is
60 kg. The mean weight of boys in the class is 70 kg. and that of
the girls is 55 kg. Find the number of girls in the class.
Solution :
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