NIMCET 2026 — Reasoning PYQ

Let the average contribution of the entire group of ten people be $A$.

1. Set up the equation:

• The total contribution is $10\cdot A$.

• The contribution of the first nine people is $9\cdot 400=3600$.

• The tenth person contributed $A+900$.

The total contribution is the sum of these parts:

$$10\cdot A=3600+(A+900)$$

2. Solve for $A$:

$$10\cdot A=4500+A$$

$$9\cdot A=4500$$

$$A=500$$

3. Find the tenth person's contribution:

• The tenth person's contribution = $A+900=500+900=1400$.

Therefore, the tenth person contributed (d) ₹1400.