Ratio, Proportion


  1. If 3/4th of the employees in a super market are not college graduates What is the ratio of the number of college graduates to those who are not college graduates ?









  1. View Hint View Answer Discuss in Forum

    Of every 4 employees, 1 is college graduate and 3 are not college graduates.

    Correct Option: C

    Of every 4 employees, 1 is college graduate and 3 are not college graduates.
    ∴ The required ration = 1 : 3


  1. The strength of a school is 840. The ratio of the number of students talking English to the number of students not talking English is 4 : 3. How many of the students take English ?









  1. View Hint View Answer Discuss in Forum

    The number of students talking English = 4/(4 + 3) x 840

    Correct Option: A

    The number of students talking English = 4/(4 + 3) x 840 = 480



  1. A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 1 : 2 : 3 . If their total value is ₹ 60, then the number of 5 paise coins is ?









  1. View Hint View Answer Discuss in Forum

    Let the number of 25 paise, 10 paise and 5 paise coins be N, 2N and 3N, respectively. Then ,
    N + 2N + 3N = 60

    Correct Option: C

    Let the number of 25 paise, 10 paise and 5 paise coins be N, 2N and 3N, respectively. Then ,
    N + 2N + 3N = 60
    ⇒ N = 10
    ∴ The number of 5 paise coins = 3 x 10 = 30


  1. Some money is divided amongst three workers A, B and C such that 5 times A's share is equal to 12 times B's share which is equal to 6 times C's share. The ratio between the shares of A, B and C is ?









  1. View Hint View Answer Discuss in Forum

    Let 5A = 12B = 6C = k
    Then, A = k/5, B = k/12 and C = k/6

    Correct Option: B

    Let 5A = 12B = 6C = k
    Then, A = k/5, B = k/12 and C = k/6
    ∴ A : B : C = k/5 : k/12 : k/6 = 12 : 5 : 10



  1. ₹ 750 is distributed among A, B and C such that A : B = 5 : 2, B : C = 7 : 13, then what is A's part ?









  1. View Hint View Answer Discuss in Forum

    A : B = 5 : 2 = 5/2 : 1, B : C = 7 : 13 = 1 : 13/7
    A : B : C = 5/2 : 1 : 13/7 = 35 : 14 : 26

    Correct Option: D

    A : B = 5 : 2 = 5/2 : 1, B : C = 7 : 13 = 1 : 13/7
    A : B : C = 5/2 : 1 : 13/7 = 35 : 14 : 26
    ∴ A's part = 750 x 35/75 = ₹ 350