SOLUTION: a class has 24 boys and 16 girls. On a test the class mean was 75. the mean of the girl's score was 72. What was the mean of the boy's sccores?
Algebra ->
Percentage-and-ratio-word-problems
-> SOLUTION: a class has 24 boys and 16 girls. On a test the class mean was 75. the mean of the girl's score was 72. What was the mean of the boy's sccores?
Log On
Question 304705: a class has 24 boys and 16 girls. On a test the class mean was 75. the mean of the girl's score was 72. What was the mean of the boy's sccores? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! a class has 24 boys and 16 girls. On a test the class mean was 75. the mean of the girl's score was 72. What was the mean of the boy's sccores?
24+16 = 40 students.... mean = 75
Total scored by 40 students = 3000
Girls = 16 ....their mean = 72
total scored by girls = 16*72= 1152
Difference between the scores will give total score of boys.
3000-1152 = 1848
Number of boys = 24
their mean will be 1848 / 24
=77
