Quiz Discussion

If 25a + 25b = 115, what is the average of a and b?

Course Name: Quantitative Aptitude

  • 1] 2.5
  • 2] 3.4
  • 3] 4.5
  • 4] 4.6
  • 5] None of these
Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 kg. What was the teacher’s weight?

  • 1] 86 kg
  • 2] 64 kg
  • 3] 72 kg
  • 4] 84 kg
Solution
2
Discuss

Four years ago, the average age of A and B was 18 years. At present the average age of A, B, and C is 24 years. What would be the age of C after 8 years?

  • 1] 25 years
  • 2] 28 years
  • 3] 32 years
  • 4] 36 years
Solution
3
Discuss

The average of 11 results is 60. If the average of first six results is 58 and that of last six is 63, find the 6th result-

  • 1] 66
  • 2] 55
  • 3] 64
  • 4] 68
Solution
4
Discuss

The mean of 100 observations was calculated as 40. It was founder later on that one of the observation was misread as 83 instead of 53. The correct mean is :

  • 1] 39
  • 2] 39.7
  • 3] 40.3
  • 4] 42.7
Solution
5
Discuss

A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is :

  • 1] 130
  • 2] 128
  • 3] 70
  • 4] 68
Solution
6
Discuss

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, Science, Social Studies and Craft were 70. If the average mark in all seven subjects is 58, his score in Maths was -

  • 1] 50
  • 2] 52
  • 3] 60
  • 4] 74
Solution
7
Discuss

The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55% is-

  • 1] 45
  • 2] 50
  • 3] 51.4 approx
  • 4] 54.6 approx
Solution
8
Discuss

If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is

  • 1] a = b = c
  • 2] a : b : c = 3 : 2 : 4
  • 3] 4a = 5b = c
  • 4] a + b + c = 12
Solution
9
Discuss

The average age of 40 students of class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted students is ?

  • 1] 19 years
  • 2] 19 years 6 months
  • 3] 20 years
  • 4] 20 years 6 months
Solution
10
Discuss

Find the average of 205, 302, 108, 403, and 202-

  • 1] 450
  • 2] 1125
  • 3] 244
  • 4] 1220
Solution
# Quiz