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Average Questions For Upcoming Exams

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Q1.
The average of 5 numbers is 306.4. The average of the
first two numbers is 431 and the average of the last
two numbers is 214.5.What is the third number?
(a)108
(b)52
(c)321
(d)Cannot be determined
(e)None of these

Q2.
Kamlesh bought 65 books for Rs. 1,050 from one shop
and 50 books for Rs. 1,020 from another. What is the
average price he paid per book?
(a)36.4
(b)Rs. 18.20
(c)Rs. 24
(d)18
(e) None of these

Q3.
The sum of five numbers is 290.The average of the
first two numbers is 48.5 and the average of last two
numbers is 53.5. What is the third number?
(a)72
(b)84
(c)96
(d)108
(e) None of these

Q4.
The average weight of a group of 53 girls was
calculated as 58 kg. It was later discovered that the
weight of one of the girls was read as 65 kg. Whereas
her actual weight was 45 kg. What is the actual
average weight of the group of 53 girls? (rounded off
to two digits after decimal)
(a) 58.62 kg.
(b) 58.37 kg.
(c) 57.37 kg.
(d) 57.62 kg.
(e) None of these

Q5.
The average marks in Science subject of a class of 20
students is 68. If the marks of two students were
misread as 48 and 65 of the actual marks 72 and 61
respectively, then what would be the correct average?
(a)68.5
(b)69
(c)69.5
(d)70
(e)66

Q6.
The average age of the family of five members is 24. If
the present age of youngest member is 8 years, then
what was the average age of the family at the time of
the birth of the youngest member?
(a) 20 years
(b) 16 years
(c) 12 years
(d) 18 years
(e) 21 years

Q7.
The average of 5 numbers is 65. The average of the
first two numbers is 81 and the average of the last two
numbers is 38. What is the third number?
(a)63
(b)87
(c)99
(d)Cannot be determined
(e)None of these

Q8.
The total marks obtained by a student in Physics,
Chemistry and Mathematics together are 120 more
than the marks obtained by him in Chemistry. What is
the average marks obtained by him in Physics and
Mathematics together?
(a)60
(b)120
(c)40
(d)Cannot be determined
(e)None of these

Q9.
The average age of 80 boys in a class is 15 years, The
average age of a group of 15 boys in the class is 16
years and the average age of another 25 boys in the
class is 14 years. What is the average age of the
remaining boys in the class?
(a) 15.25 years
(b) 14 years
(c)14.75 years
(d)Cannot be determined
(e)None of these

Q10.
The average age of seven boys sitting in a row facing
North is 26 years. If the average age of first three boys
is 19 years and the average age of last three boys is 32
years, what is the age of the boy who is sitting in
middle of the row?
(a)28 years
(b) 29 years
(c) 24 years
(d) 31 years
(e) None of these

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