Q. 155.0( 1 Vote )

A child has plast

Answer :

Given: We have toys with bearing 4, 4 and 5


To Find: Number of 3-digit numbers he can make


The formula used: The number of permutations of n objects, where p1 objects are of one kind, p2 are of the second kind, ..., pk is of a kth kind and the rest, if any, are of a different kind is


The child has to form a 3-digit number.


Here the child has two 4’s.


We have to use the above formula


Where,


n=3


p1=2



The numbers are 544, 454 and 445.


He can make 3 3-digit numbers.


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