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The income of A, B and C are in the ratio 7: 9: 12 and their expenditure are in the ratio 8 : 9 : 15. If a saves 1/4 of his income. Find the ratio of savings of A, B and C.

A.

69 : 56 : 99

B.

99 : 69 : 56

C.

99 : 56 : 69

D.

56 : 99 : 69

Answer with explanation

Answer: Option DExplanation

Workspace

Rs. 8400 is divided among A, B, C and D in such a way that the shares of A and B, B and C, and C and D are in the ratios of 2:3, 4:5 and 6:7 respectively. The share of A is

A.

Rs. 8400

B.

Rs. 1320

C.

Rs. 8210

D.

Rs. 1280

Answer with explanation

Answer: Option DExplanation

Workspace

A.

3789

B.

4208

C.

3888

D.

4500

Answer with explanation

Answer: Option CExplanation

Workspace

What ought to be added to each of the four numbers 6, 14, 18, 38 to make them corresponding?

A.

2

B.

1

C.

4

D.

3

Answer with explanation

Answer: Option AExplanation

Let the number to be added be x. Then,

6+X/14+x= 18+x/38+x

=> (6+x) (38+x)= (14+ x) (18 +x)

=> 228 +44x+x^{2} = 252+32x+x^{2}

= 12x=24

=> x=2 .

∴ the required number is 2.

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