In a certain examination, the number of passes and failures are

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 Multiple Choice QuestionsMultiple Choice Questions

1.

If A : B = 3 : 4 and B : C  = 8 : 9, then ratio A : B : C is

  • 3 : 4 : 5

  • 1 : 2  : 3

  • 7  : 12 : 17

  • 7  : 12 : 17

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2.

If a : b = b : c, then the ratio a4 : b4 is equal to

  • ac : b2

  • a2 : c2

  • c2 : a2

  • c2 : a2

691 Views

3.

80 is divided into three parts, such that the first part is 24 and the ratio of the second to the third is 4 : 3. The second part is

  • 40

  • 36

  • 32

  • 32

127 Views

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4.

In a certain examination, the number of passes and failures are in the ratio 3 : 2. If 12 more students had passed, then the ratio of passes to failures would have been 21 : 10. The number of students who have passed the examination is

  • 30

  • 35

  • 40

  • 40


A.

30

Let the number of passes be 3x and that of failures be 2x in the exam.
therefore space space fraction numerator 3 straight x plus 12 over denominator 2 straight x end fraction space equals space 21 over 10
rightwards double arrow space space space 42 straight x space minus 30 straight x space equals space 120
rightwards double arrow space space 12 straight x space equals space 120
rightwards double arrow space space space space straight x space equals space 120 over 12 space equals space 10
∴    Number of students who have passed the exam = 30

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5.

Ram and Gopal have money in the ratio 7 : 17 and Gopal and Krishna also have money in the same ratio 7 : 17, If Ram has Rs. 490, Krishna has

  • Rs. 2,330

  • Rs. 2,680

  • Rs, 2890

  • Rs, 2890

171 Views

6.

A bag contains Rs. 145 in the form of one-rupee, 50-paise and 25-paise coins in the ratio 3 : 5 : 7. The number of one-rupee coins is 

  • 60

  • 50

  • 48

  • 48

148 Views

7.

Rs. 366 are to be divided amongst A, B and C so that A may get 1 half as much as B and C together and B may get 2 over 3 as much as A and C together, A's share will be

  • Rs. 120

  • Rs. 122

  • Rs. 124

  • Rs. 124

324 Views

8.

If Girilal's salary is 11 over 7 times of Hariram's and Shekhar's is 3 over 4 times of Hariram's, What is the ratio of Girilal's salary to Shekhar's salary.

  • 44 : 21

  • 28 : 33

  • 33 : 28

  • 21 : 44


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9.

In a parade of school students, the number of boys and girls are in the ratio of  9:7 respectively and the total number of boys and girls are 256. Find the number of girls.

  • 102

  • 112

  • 118

  • 118

459 Views

10.

If 15% of x is three times of 10% of y, then x : y = ?

  • 1 : 2

  • 2 : 1

  • 3 : 2

  • 3 : 2

338 Views

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