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Quantitative Aptitude

AVERAGES MCQs

Averages

Total Questions : 3752 | Page 100 of 376 pages
Question 991.  the average of six numbers is x and the average of three of these is y. if the average of the remaining three is z, then :
  1.    x = y + z
  2.    2x = y + z
  3.    3x = 2y - 2z
  4.    none of these
 Discuss Question
Answer: Option B. -> 2x = y + z
Explanation :
Question 992.  in a village the average age of n people is 42 years. but after the verification it was found that the age of a person had been considered 20 years less than the actual age, so the new average, after
  1.    21
  2.    20
  3.    22
  4.    None of these
 Discuss Question
Answer: Option B. -> 20
Explanation :
Question 993.  a motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. his average speed for the whole journey in km/hr is :
  1.    35
  2.    36
  3.    37.5
  4.    38.2
 Discuss Question
Answer: Option C. -> 37.5
Explanation :
Question 994.  in a village the average age of n people is 42 years. but after the verification it was found that the age of a person had been considered 20 years less than the actual age, so the new average, after
  1.    21
  2.    20
  3.    22
  4.    None of these
 Discuss Question
Answer: Option B. -> 20
Explanation :
Question 995.  a motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. his average speed for the whole journey in km/hr is :
  1.    35
  2.    36
  3.    37.5
  4.    38.2
 Discuss Question
Answer: Option C. -> 37.5
Explanation :
Question 996.  the average of six numbers is x and the average of three of these is y. if the average of the remaining three is z, then :
  1.    x = y + z
  2.    2x = y + z
  3.    3x = 2y - 2z
  4.    none of these
 Discuss Question
Answer: Option B. -> 2x = y + z
Explanation :
Question 997.  the average of the two-digit numbers, which remain the same when the dibits inter-change their positions, is :
  1.    53
  2.    54
  3.    55
  4.    56
 Discuss Question
Answer: Option C. -> 55
Explanation :
Question 998.  16 children are to be divided into two groups a and b of 10 and 6 children. the average percent marks obtained by the children of group a is 75 and the average percent marks of all the 16 children is
  1.    233/3
  2.    243/4
  3.    254/5
  4.    345/7
 Discuss Question
Answer: Option A. -> 233/3
Explanation :
Question 999.  the average of six numbers is x and the average of three of these is y. if the average of the remaining three is z, then :
  1.    x = y + z
  2.    2x = y + z
  3.    3x = 2y - 2z
  4.    none of these
 Discuss Question
Answer: Option B. -> 2x = y + z
Explanation :
Question 1000.  in a village the average age of n people is 42 years. but after the verification it was found that the age of a person had been considered 20 years less than the actual age, so the new average, after
  1.    21
  2.    20
  3.    22
  4.    None of these
 Discuss Question
Answer: Option B. -> 20
Explanation :

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