CLAT - Mathematical Ability - Averages

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Question - 1

Six friends have an average height of 167 cms. Raju with a height of 162 cm leaves. What is the new average height?

  • A 166 cm
  • B 167 cm
  • C 168 cm
  • D 169 cm

Question - 2

9 men went to a hotel. 8 of them spent Rs.3 each over their meals and the ninth spend Rs.2 more than the average expenditure of all nine. Find the total money spent by all of them.

  • A Rs.26
  • B Rs.40
  • C Rs.29.25
  • D 27

Question - 3

A group of 6 students has an average weight of 55 kg if one of them is removed then the average of the remaining changes to 59 kg. What is the weight of the student who was removed?

  • A 37 kg
  • B 36 kg
  • C 35 kg
  • D 34 kg

Question - 4

Three years ago, the average age of A, B and C was 27 years and that of Band e five years ago was 20 years. A's present age is

  • A 30 years
  • B 35 years
  • C 40 years
  • D 48 years

Question - 5

Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average of the family is the same today. What is the age of the baby?

  • A 1 year
  • B 2 years
  • C 6 months
  • D 9 months

Question - 6

A certain number of trucks were required to transport 60 tons of steel wire from the TISCO factory in Jamshedpur. However, it was found that since each truck could take 0.5 tons of cargo less, another 4 trucks were needed. How many trucks were initially planned to be used?

  • A 10
  • B 15
  • C 20
  • D 25

Question - 7

In an exam, the average was found to be x marks. After deducting computational error, the average marks of 94 candidates got reduced from 84 to 64. The average thus came down by 18.8 marks. The numbers of candidates who took the exam were:

  • A 100
  • B 90
  • C 110
  • D 105

Question - 8

An investor in shares makes a profit of Rs.920 in his fifth investment, by increasing his average profit of first four investments by Rs.14. His average profit over the first four investments is

  • A 906
  • B 976
  • C 850
  • D None of these

Question - 9

The average number of printing errors per page in a book of 512 pages is 4. If the total number of printing errors in the first 302 pages is 1,208, the average number of printing errors per page in the remaining pages is

  • A 0
  • B 4
  • C 840
  • D 90

Question - 10

In a factory, the average salary of the employees is Rs.70. If the average salary of 12 officers is Rs.400 and that of the remaining employees is Rs.60, then the number of employees are

  • A 396
  • B 400
  • C 408
  • D 404
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