FACTS  AND  FORMULAE  FOR  AVERAGE QUESTIONS

 

 

1. Average =Sum of observationsNo. of observations

2. Suppose a man covers a certain distance x kmph and an equal distance at y kmph. Then, the average speed during the whole journey is2xyx+yKmph

Q:

In a class of 60 students there are 33 girls. The average weight of these girls is 62 Kg and average weight of the full class is 66.5 kg. What is the average weight of the boys of the class?

A) 72 kg B) 71 kg
C) 70 kg D) 73 kg
 
Answer & Explanation Answer: A) 72 kg

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3 1968
Q:

An engineering student has to secure 45% marks to pass. He gets 54 and fails by 36 marks. Find the maximum marks.

A) 200 marks B) 225 marks
C) 250 marks D) 275 marks
 
Answer & Explanation Answer: A) 200 marks

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5 1953
Q:

If a certain amount is fully distributed among A, B & C in such a way that A receives 1/2 of the amount, B receives 1/3 of the amount and C receives ₹ 1200, then how much money would A receive

A) 4000 B) 1600
C) 3600 D) 1800
 
Answer & Explanation Answer: C) 3600

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2 1952
Q:

In a marriage party 32% are women, 54% are men and there are 196 children. How many men are there in the marriage party?

A) 756 B) 448
C) 332 D) 324
 
Answer & Explanation Answer: A) 756

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1 1951
Q:

Average age of a team having 12 players is 23 years. If the age of the coach is also included, then the average age increases by 2 years. What is the age (inyears) of the coach?

A) 41 B) 47
C) 49 D) 51
 
Answer & Explanation Answer: C) 49

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3 1950
Q:

The average of 12 numbers is 35. If four numbers 20, 27, 15 and 29 are removed then what will be the average of remaining numbers?

A) 41.125 B) 49.5
C) 52.5 D) 38.375
 
Answer & Explanation Answer: A) 41.125

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0 1950
Q:

The average of fruits offered in a temple in a week was 75. The average of fruits offered in six days excluding Tuesday was 72. How many fruits were offered on Tuesday?

A) 90 B) 93
C) 72 D) 92
 
Answer & Explanation Answer: B) 93

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1 1945
Q:

The average age of 120 members of a society is 60.7 years. By addition of 30 new members, the average age becomes 56.3 years. What is the average age (in years) of newly joined members?

A) 36.5 B) 37.2
C) 38.3 D) 38.7
 
Answer & Explanation Answer: D) 38.7

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0 1944