Question

average of A and b is 505. average of b and c is 625.average of c and A is 520.then find A ?
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Answer 1

Answer:

sum of a and b =505×2 =1010

sum of b and c = 625×2 =1250

sum of c and a = 520×2 =1040

2(a+b+c) =1010+1250+1040 =3300

a+b+c =3300/2 =1650

(a+b+c) -(b+c) =a

1650-1250 =400

a is 400