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Computer Science
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Percentage
Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio of A : B.
2 : 3
1 : 1
3 : 4
4 : 3
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Correct Answer:
4 : 3
Explanation:
5% of A + 4% of B =
2
(6% of A + 8% of B)
3
⟹
5
A +
4
B
=
2
❨
6
A +
8
B
❩
100
100
3
100
100
⟹
1
A +
1
B
=
1
A +
4
B
20
25
25
75
⟹
❨
1
-
1
❩ A =
❨
4
-
1
❩ B
20
25
75
25
⟹
1
A =
1
B
100
75
A
=
100
=
4
.
B
75
3
∴ Required ratio = 4 : 3
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