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 Average Questions

Popular Latest Rated Important Formulae

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:

Nine students of a class contribute a certain sum of money. Seven of them gave Rs. 50 each and the other two gave respectively Rs. 50 and Rs. 90 more than the others. The average contribution of the class of 9 students is

A) Rs. 70 B) Rs. 50
C) Rs. 100 D) Rs. 120
 
Answer & Explanation Answer: A) Rs. 70

Explanation:
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Q:

The average of X, Y, Z is 24. Also, X:Y = 2:3 and X+Y = 60, then find the value of (X-Z)?

A) 9 B) 10
C) 11 D) 12
 
Answer & Explanation Answer: D) 12

Explanation:

X+Y+Z = 24*3 = 72 X:Y = 2:3 (Given)
Let ‘X’ to be 2a & ‘Y’ to be 3a
X+Y = 60 (Given)
2a+3a = 60
5a = 60
a = 12
Hence, X = 24 & Y = 36
From equation (1)...
Z = 72 - 60
Z = 12
Hence, X - Z = 24-12 = 12.

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Q:

A batsman makes 100 runs in the 25th match of his career. His average runs per match increases by 1.4. Find his average before the 25th match.

A) 65 B) 55
C) 75 D) 45
 
Answer & Explanation Answer: A) 65

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0 2170
Q:

What is the average of first 39 even numbers ?

A) 39 B) 40
C) 20 D) 68
 
Answer & Explanation Answer: B) 40

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Q:

What is the average of first 93 natural numbers?

A) 45 B) 46
C) 47 D) 49
 
Answer & Explanation Answer: C) 47

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1 2090
Q:

Average of 11 numbers is 7. If every number is doubled, then what will be the new average of the numbers?

A) 3.5 B) 7
C) 10.5 D) 14
 
Answer & Explanation Answer: D) 14

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3 2055
Q:

In the first 39 overs of a cricket match, the run rate was 4.6 runs/over. Calculate the required run rate in the remaining 11 overs to reach the target of 252 runs?

A) 7.2 B) 5.7
C) 6.3 D) 6.6
 
Answer & Explanation Answer: D) 6.6

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Exam Prep: AIEEE , Bank Exams , CAT

2 2055
Q:

The simple interest on a sum for 20 years is 5/4 of the principal. What is the per annum rate (in percentage) of interest?

A) 6.25 B) 12.5
C) 2.5 D) 5
 
Answer & Explanation Answer: A) 6.25

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1 2011