SSC CPO SI and ASI Model Paper 6

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Question : 117 of 200

Marks: +1, -0

The value of

1 /3.4 +1/4.5+ ............ +1/8.9

is ____?

$1 /8$
$1/ 6$
$2 /9$
$7/ 8$

Solution:

(3) The given expression is:

1/3.4 + 1/4.5+ ............+1/8.9

=[1/3-1/4]+[1/4-1/5]+.......+[1/8-1/9]

=1/3-1/4+1/4-1/5+.......+1/8-1/9

=1/3-1/9={3-1}/9=2/9

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