Railways NTPC · Mathematics

Averages and ratios

12 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 12 questions

The average of $4$ numbers is $55$ . What is their sum?
The average of $6$ numbers is $48$ . What is their sum?
The average of $8$ numbers is $49$ . What is their sum?
The average of $6$ numbers is $49$ . What is their sum?
The average of $5$ numbers is $34$ . What is their sum?
Two numbers are in the ratio $5 : 3$ and their difference is $14$ . What is the larger number?
Two numbers are in the ratio $7 : 4$ and their difference is $15$ . What is the larger number?
The average of $6$ numbers is $42$ . What is their sum?
The average weight of 8 railway wagons increases by 1.5 kg when a new wagon replaces one weighing 65 kg. What is the weight of the new wagon?
A railway station manager distributes 105 tokens among A, B, and C such that A gets twice as many as B, and B gets twice as many as C. How many tokens does A receive?
The average speed of a commuter train for 5 days of operation is 48 km/h. If the speeds for the first 4 days were 45, 52, 46, and 49 km/h, what was its speed on the fifth day?
The average speed of a commuter train for 5 days of operation is 50 km/h. If the speeds for the first 4 days were 45, 52, 47, and 48 km/h, what was its speed on the fifth day?

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