NET Engineering MCQs

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 greatest common divisor of 24 and 36 is 12.
Dividing both terms by 12 gives 2:3.

Three ratio parts correspond to 24, so one part is 8.
Girls represent five parts, giving 5 × 8 = 40.

The total number of ratio parts is 9, so one part is 720/9 = 80.
The largest share is 4 × 80 = Rs. 320.

Make the common term b equal in both ratios.
Multiplying 4:7 by 2 gives 8:14, so a:b:c = 8:14:15.

The cost per pen is 150 ÷ 5 = Rs. 30.
Eight pens cost 8 × 30 = Rs. 240.

Workers and time are inversely proportional for fixed work.
Thus, 12 × 15 = 20 × days, giving 9 days.

The sum is 12 + 18 + 20 + 30 = 80.
Dividing by 4 gives an average of 20.

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

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

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

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