Question

A school has 4 sections in class X having 45, 50, 42 and 30 students respectively. A
test in Mathematics was conducted in all the sections and the mean marks of these
sections are 62,55,58 and 49 respectively. Find the overall average mark of the class.​

Answer 1

Answer:

ANSWER

⇒ For 1st section total marks obtain by class =40×50=2000

⇒ For 2nd section total marks obtain by class =35×60=2100

⇒ For 3rd section total marks obtain by class =45×55=2475

⇒ For 4th section total marks obtain by class =42×45=1890

⇒ The overall average of marks per students =

40+35+45+42

2000+2100+2475+1890

=

162

8465

=52.25

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