Avg age of X number of adults in a class is 30yrs. If 12 new adults with avg age of 32 joined with them then the avg age increases by one. Find X?

Dear Hemant

Sum of age of X adults=30X

sum of age of 12 new adults=12x32=384

new avg=384+30X/X+12 = 31

solve for X

X=12

 All the best.                                                          

AKASH GOYAL

AskiitiansExpert-IIT Delhi

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