Question

A person gets one rupee for each successful target hitting, and one rupee is lost for each missed target. If the total chances taken by the person are 100 and earned rupees are 30, what is the number of successful attempts?

• A. \( \text{70} \)
• B. \( \text{60} \)
• C. \( \text{75} \)
• D. \( \text{65} \)

Hint:

Setting up algebraic equations simplifies logic-based number problems.

Answer 1

The Correct Option is D

Let \( S \) be the number of successful attempts and \( M \) be the missed attempts. Since total attempts = 100, we get: \[ S + M = 100 \] The net earnings equation: \[ S - M = 30 \] Solving the equations: \[ S + (100 - S) = 100 \] \[ S - (100 - S) = 30 \] \[ 2S = 130 \] \[ S = 65 \] Thus, the person had 65 successful attempts.