Quiz Discussion

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-

Course Name: Quantitative Aptitude

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

Mukesh has twice as much money as Soham. Soham has 50% more money than Pankaj. If the average money with them is Rs. 110, then Mukesh has :

  • 1] Rs. 155
  • 2] Rs. 160
  • 3] Rs. 180
  • 4] Rs. 175
Solution
2
Discuss

The average weight of 8 men is increased by 1.5 kg when one of the men, who weight 65 kg is replaced by a new man. The weight of the new man is-

  • 1] 70 kg
  • 2] 74 kg
  • 3] 76 kg
  • 4] 77 kg
Solution
3
Discuss

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.

 

  • 1] 125 km/hr
  • 2] 75 km/hr
  • 3] 135 km/hr
  • 4] 120 km/hr
Solution
4
Discuss

The average of the first five multiples of 9 is:

 

  • 1] 20
  • 2] 27
  • 3] 28
  • 4] 30
Solution
5
Discuss

An elevator can carry maximum of 16 passengers with an average weight of 80 kg. However, four boys more than the maximum carrying capacity of the elevator entered it making the average weight as 86 kg and overloading the elevator. What is the average weight of those four boys ?

  • 1] 112 kg
  • 2] 108 kg
  • 3] 110 kg
  • 4] 98 kg
Solution
6
Discuss

A has 50 coins of 10 paise denominations. While B has 10 coins of 50 paise denominations. C has 20 coins of 25 paise denominations while D has 25 coins of 20 paise denominations. The average number of paise per person is :

  • 1] 450 paise
  • 2] 500 paise
  • 3] 550 paise
  • 4] 650 paise
Solution
7
Discuss

The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday and Saturday was 41° C. If temperature on Saturday was 42° C, what was the temperature on Wednesday?

  • 1] 39° C
  • 2] 44° C
  • 3] 38° C
  • 4] 41° C
Solution
8
Discuss

Find the average of first 97 natural numbers.

 

  • 1] 47
  • 2] 37
  • 3] 48
  • 4] 49
  • 5] 49.5
Solution
9
Discuss

The average of the largest and smallest 3 digits numbers formed by 0, 2 and 4 would be :

  • 1] 312
  • 2] 222
  • 3] 213
  • 4] 303
Solution
10
Discuss

If the mean of a,b,c is M and ab+bc+ca=0, then the mean of a2,b2,c2 is:

  • 1]

    M2

  • 2]

    3M2

  • 3]

    6M2

  • 4]

    9M2

Solution
# Quiz