Math, asked by moniverma9766, 1 year ago

seema , neha , poonam are friend . if seema got in her class test 18 out of 20 and neha got 18 out of 20 and its average is 19 how much did poonam got

Answers

Answered by hardik27
0
let poonams marks be X

acc to que

(18+18+X)/3=19

=36+X=19*3

36+X=57

X=57-36

X=21

so poonam got 21 marks out of 20

I don't know how its possible
maybe for handwriting but its the answer buddy...

hope it helps:-)
Answered by vinithavini686
0

let x be poonam's mark

18 +18+x/20=19

=36+x/20=19

=9/5x = 19

=9x=19*5

=9x=95

=x =95/9

=x= 10 1/2

poonam got 10 n a half mark

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