Extra practice problems p&c - class xi - module 2

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Mishal Chauhan

permutation and combination

Education

MISHAL CHAUHAN
CLASS 11
MODULE - 2
LECTURE SLIDES - MISHAL
CHAUHAN

LECTURE SLIDES - MISHAL
CHAUHAN
If the maximum number of trials
required to open all locks when there
are n locks and n keys is 105,
then n =
(1) 13 (2) 14 (3) 35 (4) 20

LECTURE SLIDES - MISHAL
CHAUHAN
Number of ways in which 15 different
books can be arranged on a shelf so that
two particular books shall not
be together is

LECTURE SLIDES - MISHAL
CHAUHAN
The number of ways of putting 6 letters
into 6 addressed envelopes so that
exactly 2 letters are in wrong envelops
is..
(2) 30 (3) 45 (4) 28

LECTURE SLIDES - MISHAL
CHAUHAN
Five boys are to be seated in a row.
The number of ways in which 3 boys
are not seated in the place specified
to them is
(2) 10 (3) 40 (4) 25

LECTURE SLIDES - MISHAL
CHAUHAN
Find the number of zeros at
the end of 130!

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