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IBPS Clerk Mains 2017 Paper
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© examsnet.com
Question : 93
Total: 178
An alloy of Tin and Silver has 40% Tin. Another alloy of Tin and Zinc has Tin and Zinc in the ratio 2 : 7. These two alloys are mixed in ratio 5 : 3. Quantity of Silver is what percent more/less than the quantity of Tin in final alloy.
111
1
9
%
111
1
3
%
12%
13%
12.5%
Validate
Solution:
(e)
1
s
t
Alloy ratio Tin : Silver
2 : 3
2
n
d
Alloy ratio Tin : Zinc
2 : 7
In final alloy ratio is 5 : 3
Let quantity → 5x and 3x
Quantity of Tin in final alloy
=
2
5
×
5
x
+
2
9
×
3
x
=
8
x
3
Quantity of Silver
=
3
5
×
5
x
=
3
x
Required percentage
=
3
x
−
8
x
3
8
x
3
×
100
=
12.5
%
© examsnet.com
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