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CDS Model Paper 1 Mathematics
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© examsnet.com
Question : 4
Total: 100
In three numbers, the first is twice the second and thrice the third. If the average of these three numbers is 44 , then the first number is :
72
24
36
44
Validate
Solution:
Let the three numbers be
x
,
y
and
z
∴ From given conditions,
x
=
2
y
=
3
z
⇒
y
=
x
2
and
z
=
x
3
Given, Average of these three nos. is 44
∴
x
+
x
2
+
x
3
3
=
44
⇒
11
x
18
=
44
⇒
x
=
72
© examsnet.com
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