SOLUTION: The mean of 10 boys in a class is 70% whereas all the mean marks of 15 girls is 60%. The mean mark of all the 25 students is

Algebra.Com
Question 1080686: The mean of 10 boys in a class is 70% whereas all the mean marks of 15 girls is 60%. The mean mark of all the 25 students is
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
S0 then the total score for the boys is,

and for the girls,

So all together,



Now divide by the total number of students,

Work that out for the answer.
RELATED QUESTIONS

Mean score of a class is 70, mean score of boys is 60 and mean score of girls is 75.... (answered by Edwin McCravy)
The mean of the marks in Physics of 100 students of a class was 72. The mean of marks of... (answered by lwsshak3)
the mean marks in statistics of 100 students of a class was 72 the mean of marks of boys... (answered by ewatrrr)
Twelve girls and 8 boys in a class took the same test. The mean mark for the girls is... (answered by Theo)
The mean of marks scored by 30 girls of a class is 44%. The mean for boys is 42%. The... (answered by fractalier)
in a certain statistics class, the marks obtained by students on a class test followed a... (answered by stanbon)
In a class, the number of boys and girls are in ratio 3:2. In a test, the mean score for... (answered by ankor@dixie-net.com)
the mean weight of 150 students in a certain class is 30kg. the mean weight of the boys... (answered by LinnW)
the instructor of Biostatistics course is assumed that the distribution of marks of... (answered by ewatrrr)