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
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Answered by
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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:-)
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
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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