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A box has 210 coins of denominations one-rupee and fifty paise only. The ratio of their respective values is 13 : 11. The number of one-rupee coin is

A. 65

B. 66

C. 77

D. 78

Answer: Option D

Solution(By Examveda Team)

Respective ratio of the number of coins;
= 13 : 11 × 2 = 13 : 22
Hence, Number of 1 rupee coins;
= $$\frac{{13 \times 210}}{{13 + 22}}$$   = 78

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Comments ( 4 )

  1. Hema Barbie
    Hema Barbie :
    6 months ago

    @sailent ratio of two values must have same unit. so inorder to make 50paise into rupee we multiply by 2 (2*50paise = 1rupee)

  2. Rahul Gargvanshi
    Rahul Gargvanshi :
    9 months ago

    Question just asked about number of one rupee coine then why 11*2?

  3. Naveen Verma
    Naveen Verma :
    2 years ago

    to make 50 paise to 1 re.we multiply 11*2

  4. Sailent Suting
    Sailent Suting :
    2 years ago

    Why multiply 11*2 I don't understand please anybody help me

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