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IBPS RRB Officer Prelims 10 Sep 2017 Paper
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© examsnet.com
Question : 64
Total: 80
Purav invested equal sums in schemes A and B respectively for 4 years and 2 years respectivery. Scheme A offers simple interest at the rate of 12 p.c.p.a. and scheme B offers compound interest (compounded annually) at 10 p.c.p.a. If the total interest earned by him from both the schemes together is Rs. 2208, what is the interest earned by him from scheme B?
Rs. 642
Rs. 664
Rs. 672
Rs. 716
Rs. 824
Validate
Solution:
(3) Let investment in eachscheme be Rs. x.
S.I.
=
P
r
i
n
c
i
p
a
l
×
T
i
m
e
×
R
a
t
e
100
=
x
×
4
×
12
100
=
R
s
.
12
x
25
C.I.
=
P
[
[
1
+
R
100
]
T
−
1
]
=
x
[
[
1
+
10
100
]
2
–
1
]
=
x
[
121
100
–
1
]
=
R
s
.
21
x
100
According to the question,
12
x
25
+
21
x
100
=
2208
⇒
48
x
+
21
x
100
=
2208
⇒ 69x = 220800
⇒
x
=
220800
69
=
R
s
.
3200
∴
C
.
I
.
=
3200
×
21
100
=
R
s
.
672
© examsnet.com
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