2. If x is substracted from each of the numbers 20, 37, 54 and 105, then the numbers so obtained
in this order are in proportion. What is the mean proportional between (7x- 5) and (x + 1)?
x (7x- 5) (x +
1)
(a) 8 (b) 9 (c) 6 (d) 12
3. The ratio of the incomes of A and B is 3 : 5, whereas the ratio of their expenditure is 4 : 7
respectivley . If A and B save Rs. 16,000 and 26,000 respectivley then what is the difference
between their expenditures?
A B 3 : 5 श 4 : 7 A B श
(a) 6800 (b) 5400 (c) 5000 (d) 6000
4. A man spends
rd of his income. If his income increases by 14% and the expenditure
increases by 20%, then the percentage increase in his savings will be
% %
श
(a) 1% (b) 2% (c) 4% (d) 6%
5. A sum is distributed between A, B and C in the ratio 9 : 6 : 11. If A gives 500 from his share
to C, the ratio of shares of A , B and C becomes 4 : 3 : 6. What is the sum of shares of B and
C, in the beginning?
श A ,B C 9 : 6 : 11 A C A, B C
4 : 3 : 6 B C
(a) 7,800 (b) 9,100 (c) 7,500 (d) 8,500
6. Seven years ago, the ages (in years) of A and B were in the ratio 4 : 5 and 7 years hence, their
ages will be in the ratio 5 : 6. What will be the ratio of their ages 5 years from now?
वर्ष A B वर्ो वर्ष
वर्ष
(a) 34 : 41 (b) 33 : 40 (c) 31 : 33 (d) 33 : 34
7. Two persons A and B are given Rs.2,040 per week each by their employer. If the amount
given to B is 140% of the amount given to A, then the amount given to A per week is?
A B B A
श 140 श A
(a) Rs.850 (b) Rs.820 (c) Rs.750 (d) Rs.800
8. 7 years ago, the average age of husband, wife and child was 42 years and 9 years ago, the
average age of wife and child was 36 years. What is the present age of the husband?
Answers
6000 is difference between their expenditures
Step-by-step explanation:
The ratio of the incomes of A and B is 3 : 5, where as the ratio of their expenditure is 4 : 7 respectivley .A and B save Rs. 16,000 and 26,000 respectivley
A income = 3A
B income = 5A
A expenditure = 4E
B expenditure = 7E
A saving = 3A - 4E = 16000
B Saving = 5A - 7E = 26000
=> (3A - 4E)/(5A - 7E) = 16000/26000
=> 13(3A - 4E) = 8(5A - 7E)
=> 39A - 52E = 40A - 56E
=> A = 4E
A Saving = 3A - 4E = 12E - 4E = 8E =16000
=> E = 2000
Difference between expenditures = 7E - 4E = 3E
= 3 * 2000
= 6000
6000 is difference between their expenditures
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