Question 141
If 30% of A is added to 40% of B, the answer is 80% of B. What percentage of A is B?
Solution
it is given that
0.3 A + 0.4 B = 0.8 B
0.3 A = 0.4 B
A = 4/3 B
B = 3/4 A
hence B is 75 % of A
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