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RBI Grade B Officers 2011 dec Paper
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© examsiri.com
Question :
119 of 200
Marks:
+1
,
-0
I
.
8
x
+
7
y
=
135
I
I
.
5
x
+
6
y
=
99
I
I
I
.
9
y
+
8
z
=
121
x < y = z
x
<
y < z
x < y > z
x = y > z
x = y = z or if none ofthe above relationshipis established
Validate
Solution:
(4) By equation I × 5 – II × 8
40
x
+
35
y
=
675
40
x
+
48
y
=
792
– – –
______________
–13y = – 117
⇒y = 9
From equation I,
8
x
+
7
×
9
=
135
⇒
8
x
=
135
–
63
=
72
⇒ x = 9
From equation III,
9
×
9
+
8
z
=
121
⇒
8
z
=
121
–
81
=
40
⇒
z
=
5
Clearly,
x = y > z
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