1) What will be the fraction of 2
- 1) 1/4
- 2) 1/5
- 3) 1/10
- 4) None of above
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Ans. B
Explanation :
It will 20*1/100 = 1/5
2) What will be the fraction of
- 1) 1/20
- 2) 1/50
- 3) 1/75
- 4) 1/25
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Ans. D
Explanation :
4*1/100 = 1/25.
Friends I know it is quite simple, but trust me while solving percentage questions in Hurry we use to do these types of mistake only. So I recommend you to have a bit practise of this.
3) The ratio 5:20 expressed as percent equals
- 1) 50 %
- 2) 125 %
- 3) 25 %
- 4) None of above
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Ans. C
Explanation :
Actually it means 5 is what percent of 20, which can be calculated as,
(5/20)*100 = 5 * 5 = 25
4) 2.09 can be expressed in terms of percentage
- 1) 2.09%
- 2) 20.9%
- 3) 209%
- 4) 0.209%
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Ans. C
Explanation :
While calculation in terms of percentage we need to multiply by 100, so
2.09 * 100 = 209.
5) Half of 1 percent written as decimal
- 1) 5
- 2) 0.5
- 3) 0.05
- 4) 0.005
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Ans. D
Explanation :
It will be 1/2(1%) = 1/2(1/100) = 1/200 = 0.005
6) What is 15 percent of
- 1) 5.10
- 2) 4.10
- 3) 3.10
- 4) 2.10
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Ans. A
Explanation :
It will be 15% of 34
= (15/100) * 34 = 5.10
7) Evaluate 28% of 450 + 45% of 2
- 1) 232
- 2) 242
- 3) 252
- 4) 262
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Ans. C
Explanation :
= (28/100) * 450 + (45/100) * 280
= 126 + 126 = 252
8) Two numbers are less than third number by 30% and 37% respectively. How much percent is the second number less than by the fi
- 1) 8%
- 2) 9%
- 3) 10%
- 4) 11%
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Ans. C
Explanation :
Let the third number is x.
then first number = (100-30)% of x
= 70% of x = 7x/10
Second number is (63x/100)
Difference = 7x/10 - 63x/100 = 7x/10
So required percentage is, difference is what percent of first number
=> (7x/100 * 10/7x * 100 )% = 10%
9) Due to an increase in 30% in the price of eggs, 3 eggs less are available for Rs. 7.80. Find the present rate of eggs per doz
- 1) Rs. 9.36
- 2) Rs. 10.36
- 3) Rs. 11.36
- 4) Rs. 12.36
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Ans. A
Explanation :
Let the original price per egg be Rs x
Then increased price will be,
\begin{aligned}
\left(\frac{130}{100}x\right) \=> \frac{7.80}{x}-\frac{7.80}{\frac{130}{100}x} = 3\=> \frac{7.80}{x}-\frac{780}{130x} = 3 \=> 390x = 234 \=> x = 0.6 \
\text{Actual price was Rs 0.6} \\text{Present price per dozen will be} \Rs.\left(12*\frac{130}{100}*0.6 \right) \= Rs. 9.36
\end{aligned}
10) In an examination, 34% of the students failed in mathematics and 42% failed in English. If 20% of the students failed in both the subjects, then find the percentage of students who passed in both the subjec
- 1) 40%
- 2) 42%
- 3) 44%
- 4) 46%
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Ans. C
Explanation :
Failed in mathematics, n(A) = 34
Failed in English, n(B) = 42
\begin{aligned}
n(A\cup B) = n(A)+n(B)-n(A\cap B) \= 34+42-20 = 56 \\text{Failed in either or both subjects are 56} \\text{Percentage passed = }(100-56)\% \= 44\%
\end{aligned}