Question

the avrage age of 25student of a class is 13year out of them the avrage age of 15student is 18year find the avrage age of remaning student​

Answer 1

Answer:

25*13=325

15*18=270

325-270=60

60 total for 10students

average 60/10=6

Answer 2

Average age of 25Students=13yrs

Sum of their ages. =25×13=325yrs

Average age of 15students=18yrs

Sum of their ages= 18×15yrs=270yrs

so,age of remaining students=(325–270)=55yr

Remaining students=10

Average age of remaining students=55/10=5.5yrs

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