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RRB Junior Engineer Stage 1 Model Papers 4
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© examsnet.com
Question : 30
Total: 99
If
a
+
1
b
=
1
and
b
+
1
c
=
1
then
c
+
1
a
is equal to
0
1
2
1
2
Validate
Solution:
a
+
1
b
=
1
and
b
+
1
c
=
1
b
=
1
−
1
c
So,
a
+
1
1
−
1
c
=
1
⇒
a
+
c
c
−
1
=
1
⇒
a
=
1
−
c
c
−
1
⇒
a
=
c
−
1
−
c
c
−
1
=
−
1
c
−
1
So,
c
+
1
a
=
c
+
(
1
1
c
−
1
)
=
c
−
(
c
−
1
)
=
c
−
c
+
1
=
1
© examsnet.com
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