Percentage Practice Question and Answer
8 Q: If price of the table is increased by 25%, then a person can buy 25 table less for Rs 25000. What is the original price (in Rs) of the table?
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606426eb8aaa67545d7d4d90- 1225false
- 2250false
- 3200true
- 4167false
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Answer : 3. "200"
Q:Answer the following questions
Manoj gave 60% of his salary to his wife and invested rest amount in mutual funds. His wife spends 30% amount on grocery and 20% on rent. From remaining amount, she purchased gold worth Rs. 18000. Find salary of Manoj.
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63bd5a7e74eba5069d4a6fb6- 1Rs 60000true
- 2Rs 54000false
- 3Rs 64000false
- 4Rs 58000false
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Answer : 1. "Rs 60000"
Q: The price of sugar increases by 15%. By what percentage should the consumption of sugar be decreased so that the expenditure on the purchase of sugar remains the same? [Give your answer correct to 2 decimal places.]
1264 0643d140332185cce373eec85
643d140332185cce373eec85- 111.11%false
- 212.5%false
- 314.16%false
- 413.04%true
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Answer : 4. "13.04%"
Explanation :
To solve this problem, let's denote:
- Initial price of sugar = P
- Initial quantity consumed = Q
- Initial expenditure = PQ
After the price increases by 15%, the new price becomes 1.15P.
To keep the expenditure constant, the new quantity consumed (let's call it Q') can be calculated using the formula:
New expenditure = New price × New quantity
Setting the new expenditure equal to the initial expenditure:
PQ = (1.15P) * Q'
Now, solve for Q':
Q' = PQ / (1.15P)
Simplify:
Q' = Q / 1.15
Now, let's find the percentage decrease in consumption:
Percentage decrease = [(Q - Q') / Q] * 100
Substituting the value of Q':
Percentage decrease = [(Q - (Q / 1.15)) / Q] * 100
Percentage decrease = [(Q * (1 - 1/1.15)) / Q] * 100
Percentage decrease ≈ [(1 - 0.8696) * 100] ≈ 13.04%
Therefore, the consumption of sugar should be decreased by approximately 13.04% to keep the expenditure on the purchase of sugar the same after a 15% increase in price.
Q: What is the 15 % of 34?
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606c3e54f306525d8e189780- 15false
- 25.1true
- 34.9false
- 45.2false
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Answer : 2. "5.1"
Q: 60% boys are failed in History and 65% boys are failed in Geography while total 30% boys are failed in both the subjects. If total 1200 boys appeared in the examination then total how many boys are passed?
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60af74cdd752621d4fa2d58a- 1560false
- 2660true
- 3330false
- 4400false
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Answer : 2. "660"
Q: In an examination, 93 % of students passed and 259 failed. The total number of students appearing at the examination was:
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5ef478edf2ebd073795cb3f2- 13950false
- 23850false
- 33700true
- 44200false
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Answer : 3. " 3700 "
Q: A man spends a part of his monthly income and saves the rest. The ratio of his expenditure to the saving is 61 : 6. If his monthly income is Rs .8710, the amount of his monthly saving is
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5ef57204f2ebd073795ec480- 1रु. 870false
- 2रु. 980false
- 3रु. 780true
- 4रु. 690false
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Answer : 3. "रु. 780"
Q: The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the marks obtained by the last student?
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638dd3e09ebad6607b985e0c- 190%false
- 260%false
- 380%true
- 470%false
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