IIMB 2001 (QA) PYQs

A and B are the two alloys of copper and brass prepared by mixing metals in the proportion of $7:2$ and $7:11$ respectively. If the two alloys are mixed in the ratio $3:2$, and melted to form a third alloy called C, then the proportion of brass and copper in C will be,

The ratio of monthly income of P to monthly income of Q is 9: 11, and P's savings are $\frac{100}{3}$ % more than Q's savings. What is the expenditure (in ₹) of P, if the sum of monthly income of P and Q is ₹2,40,000, and expenditure (in ₹) of Q is ₹84000?

The expenses of U.A. High School consist of a fixed component and a variable component that depends on the number of students. When the school had $150$ students, the total expenses amounted to Rs. $10,000$, and when there were $120$ students, the expenses were Rs. $8,400$. Determine the total expenses when the school has $330$ students.