Average Question & Answers
A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning?
Let the average after 7th inning = x
Then average after 16th inning = x - 3
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Subject: Average - Quantitative Aptitude - Arithmetic Ability
The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?
A) 70 kgB) 75 kgC) 80 kgD) 85 kg
Answer & ExplanationAnswer: D) 85 kg
Explanation:
Total weight increased = (8 x 2.5) kg = 20 kg.
Weight of new person = (65 + 20) kg = 85 kg.
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Subject: Average - Quantitative Aptitude - Arithmetic Ability
Out of 9 persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was :
A) Rs. 292.50B) Rs. 297.50C) Rs. 298D) Rs. 298.50
Answer & ExplanationAnswer: A) Rs. 292.50
Explanation:
Let the average expenditure be Rs. x Then,
Total money spent = 9x = Rs. (9 x 32.5O) = Rs 292. 50
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Subject: Average - Quantitative Aptitude - Arithmetic Ability
The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is :
A) 45 kgB) 46 kgC) 47 kgD) 48 kg
Answer & ExplanationAnswer: A) 45 kg
Explanation:
Weight of the teacher = (35.4 x 25 - 35 x 24) kg = 45 kg.
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Subject: Average - Quantitative Aptitude - Arithmetic Ability
The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team ?
A) 20 yearsB) 21 yearsC) 23 yearsD) 25 years
Answer & ExplanationAnswer: C) 23 years
Explanation:
Let the average age of the whole team be x years.
11x - (26 + 29) = 9 (x - 1)
=> 11x - 9x = 46
=> 2x = 46
=> x = 23.
So, average age of the team is 23 years.
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