- Option : A
- Explanation : According to question, R + A =10 + (A + j)=> R =10 + J. So, it is clear that John is 10 yr younger than Ravi.

- Option : D
- Explanation : Let the number of coins of

each type be x

2x/3 x 50/100 + (3x/4) x l = 26

⇒x/3 + 3x/4 = 26

⇒ 4x+9x=26 × I2

⇒ 13x = 26 × 12 ⇒ x = 24

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