Pakistan MCQs

The difference between C and A is 2 ratio parts, equal to Rs. 600.
One part is Rs. 300, so 12 parts total Rs. 3,600.

Total equals average multiplied by the number of values.
Thus, 24 × 5 = 120.

Initially, milk is 42 liters and water is 18 liters.
For a 7:5 ratio with 42 liters milk, water must be 30 liters, so add 12.

The original total is 8 × 15 = 120.
After removing 22, the total is 98, and 98 ÷ 7 = 14.

Let the numbers be 5k and 8k; then (5k + 9)/(8k + 9) = 2/3.
Solving gives k = 9, so the smaller number is 45.

The original total age is 4 × 25 = 100 years.
The new total is 5 × 27 = 135, so the new age is 35.

Profit equals selling price minus cost price.
Thus, 920 - 800 = Rs. 120.

The weighted sum is 70 × 2 + 90 × 3 = 410.
Dividing by the total weight 5 gives 82.

The total score is 20 × 60 + 30 × 70 = 3,300.
Dividing by 50 students gives 66.

The total ratio parts are 7, so one part is 35/7 = 5 liters.
Water is two parts, or 10 liters.

Thirty percent of 20 liters is 0.30 × 20.
This equals 6 liters.

The solution contains 4 liters of salt, which remains unchanged.
For salt to be 25%, total volume must be 16 liters, so 6 liters are added.