21) 1/2 is what percent of 1
- 1) 150%
- 2) 200%
- 3) 250%
- 4) 300%
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Ans. A
Explanation :
1/2/1/3 * 100 = 1/2 * 3/1 * 100 = 150 %
22) 88% of 370 + 24% of 210 - x =
- 1) 150
- 2) 250
- 3) 158
- 4) 258
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23) An inspector rejects 0.08% of the meters as defective, How many meters he examine to reject 2 mete
- 1) 1200
- 2) 2400
- 3) 1400
- 4) 2500
View Answer
View Explanation
Ans. D
Explanation :
It means that 0.08% of x = 2
\begin{aligned}
=> ( \frac{8}{100 \times 100} \times x) = 2 \ => x = \frac{2 \times 100 \times 100}{8} \ => x = 2500
\end{aligned}
24) If sales tax is reduced from 5% to 4%, then what difference it will make if you purchase an item of Rs. 1
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Ans. A
Explanation :
Clue: Answer will be 5% of 1000 - 4% of 1000
25) In expressing a length of 81.472 km as nearly as possible with the three significant digits, find the percentage er
- 1) 0.35%
- 2) 0.34%
- 3) 0.034%
- 4) 0.035%
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View Explanation
Ans. C
Explanation :
Error = (81.5 - 81.472) = 0.028
Required percentage = \begin{aligned}
\frac{0.028}{81.472} \times 100 = 0.034 %
\end{aligned}
26) In an election between two candidates, 75 % of the voters cast their votes, out of which 2% of the votes were declared invalid. A candidate got 9261 votes which were 75% of the total valid votes. Find the total number of vot
- 1) 16800
- 2) 15800
- 3) 16700
- 4) 15700
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Ans. A
Explanation :
Let the total number of votes enrolled are x.
Number of votes cast = 75% of x
Valid votes = 98% of 75% of x
Now, as 9261 is the 75% of valid casted votes so,
75% of 98% of 75% of x = 9261 [imporant]
\begin{align}
=> \frac{75 \times 98 \times 75 \times x}{100 \times 100 \times 100} = 9261 \
=> x = 16800
\end{align}
27) If 15% of 40 is greater than 25% of a number by 2, the number
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Ans. B
Explanation :
15/100 * 40 - 25/100 * x = 2 or x/4 = 4 so x = 16
28) A batsman scored 120 runs which included 3 boundaries and 8 sixes. What percent of his total score did he make by running between the wicke
- 1) 40%
- 2) 50%
- 3) 60%
- 4) 70%
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Ans. B
Explanation :
Number of runs made by running = 110 - (3 x 4 + 8 x 6)
= 120 - (60)
= 60
Now, we need to calculate 60 is what percent of 120.
=> 60/120 * 100 = 50 %
29) Three candidates contested an election and received 1136, 7636 and 11628 votes respectively. What percentage of the total votes did the winning candidate
- 1) 55%
- 2) 56%
- 3) 57%
- 4) 58%
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Ans. C
Explanation :
Total number of votes polled = (1136 + 7636 + 11628) = 20400
So, Required percentage = 11628/20400 * 100 = 57%
30) Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them
- 1) 42,30
- 2) 42,31
- 3) 42,32
- 4) 42,33
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View Explanation
Ans. D
Explanation :
Let their marks be (x+9) and x.
Then, x+9 = 56/100(x + 9 +x)
=> 25(x+9)
=> 14 (2x + 9)
=> 3x = 99
=> x = 33.
So, their marks are 42 and 33