neuseivation Which was removed.(11) There are 40 students in a class,

1.	neuseivation Which was removed.(11) There are 40 students in a class, out of them 15 are boys. The mean of marksobtained by boys is 33 and that for girls is 35. Find out the mean of all students inthe class.
Answer» Mean of marks of boys=Sum/1533=Sum/15 Sum=3315=495 Mean of marks of girls=Sum/253525=Sumsum=875 Total sum=875+495=1370Mean=1370/40=34.25

neuseivation Which was removed.(11) There are 40 students in a class, out of them 15 are boys. The mean of marksobtained by boys is 33 and that for girls is 35. Find out the mean of all students inthe class.

Answer»

Mean of marks of boys=Sum/1533=Sum/15 Sum=33*15=495

Mean of marks of girls=Sum/2535*25=Sumsum=875

Total sum=875+495=1370Mean=1370/40=34.25