A square is divided into 9 identical
smaller squares.Six identical balls
are to be placed in these smaller
squares such that each of the three
rows gets at least one ball(one
ball in one square only).In how
many different ways can this be
done?
a)91 b)51 c)81 d)41
An unfair coin with the probability of getting
head in one toss = (1/5).
If coin tosses n times, the probability of
getting 2 heads is equal to the probability of
getting 3 heads. Find n
if three numbers are drawn at random
successively without replacement from
a set S={1,2,......10}then probability that
the minimum of the choosen number is
3 or their maximum is 7
Answer=((11)/(40))
A particle, of mass 5kg,moves in
a straight line its displacement,x
metres after t seconds is given by
x = t^3 − 4t^2 +4t. Find the magnitude
of the impulses exerted on the particle
when t=2.
A panel of 3 women and 4 men is
to be formed from 8 women and
7 men.Find the number of ways
which the panel can be formed if
it must contain at least 2 women.
Three boys,two girls and a puppy
sit at a round table.In how many
ways can they be arranged if the
puppy is to be seated
i)between the two girls
ii)between any two boys