2022 · Q120
A person has a total of 100 coins consisting of Rs 2 and Rs 5 coins. If the total value of the coins is Rs 320, then the number of Rs 2 coins is
general-mental-abilityquantitative-aptitude
- A40
- B50
- C60
- D70
Explanation
Let x be the number of ₹2 coins: x + y = 100 and 2x + 5y = 320. Substituting y = 100 − x gives 2x + 5(100 − x) = 320, so 500 − 3x = 320 and x = 60.