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Q 1. The average only in
2020 was Rs. 560.
590 and for the las
months for 14
th
, 15
t
(a) Rs. 545 (b) Rs
Q 2. The average of 19 n
is 50.6 and that of t
excluded, then wha
to one decimal pape
19
47.
(a) 42.4 (b) 49
1.d
s Youtube channel -
[
Average
]
ncome of Shyam Lalduring the m
The average income for the firs
st 16 days at was Rs. 500. Wha
th
and 16
th
February
s. 400 (c) Rs. 590 (d
numbers is 48. The average of th
the last 13 numbers is 47.6. If
at is the average of the remainin
er?
48 7
.6 7
9.5 (c) 39.6
2.d
e.com/c/ABHINAYMATHS
month of February
st 16 days was Rs.
at was his average
d) Rs. 587
he first 7 numbers
the 7
th
numbers is
ng numbers correct
50.6 13
(d) 47.3

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Q 3. The average height of a certain number of students in a group 155.6
cm. If 12 students having an average height of 150.5 cm join the
group and 7 students having an average height of 159 cm leave the
group, the average height of the students in the group will decrease
by 34 mm, what is the number of students, initially, in the group ?
155.6 cm 150.5 cm
12 159 cm
7 34 mm
Q 4. The average of eighteen numbers is 42. The average of the last ten
numbers is 40 and that of the first five numbers is 44. The seventh
number is 6 then the sixth and 7 less than the eight number. The
average of the sixth and the sixth number is :
Q 5. The numbers 2, 3, 4 and 5 occur (2 + 5k), (5k – 7), (2k – 3) and (k – 2)
times, respectively. The average of the numbers is 2.85. Later on, the
number 2 was replaeced by 6 in all the places. What is the average of
the new numbers ?
2, 3, 4 5 (2 + 5k), (5k – 7), (2k – 3) (k – 2)
2.85
3.d 4.b 5.b

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Q 6. The average weight of 3 persons A,B and C is 60 kg. When D joins
the group, the average weight becomes 65kg. When another person E
whose weight is 3kg less than that of D replaces A, the average
weight of B, C, D and E becomes 67 kg. What is the weight of A?
A,B C 60 kg D
65kg E D
3kg A B, C, D E
67 kg A
(a) 60 kg (b) 69 kg (c) 72 kg (d) 65 kg