Question

in a class of 100 students the mean marks obtained in a subject is 30 and in another class of 50 students the mean marks obtained in the same subject is 60. find themean marks obtained by the students of the two classes taken together. what is the answer how did we get it [means the method]

Answer 1

total marks scored by 100 students in first class = 100×30

= 3000

total marks obtained by 50 sttudents in another class = 50×60
=3000

total no. of students = 100+50
=150
total marks obtained by 150 students = 3000+3000
=6000

hence , mean marks obtained by the students of the two classes taken together = 6000/150
=40

Answer 2

40 is the answer....