Question

The number of ways can 5 letter be put into 3 letter boxes a, b, c if letter box a must contain atleast 2 letters ________.

Answer 1

Solution:

Number of Letters= 5

Number of Letter Boxes = 3 that is a, b,c.

The  Prerequisite condition about letter and letter boxes is

→a≥2,

→b≥2,

→c≥2

→a +b +c =5

As this is not possible ,because there are only 5 letters,and if we put minimum of 2 letters in each box , it exceeds the total number of Letters which is equal to 5.

→→→So, the number of ways by which 5 letter be put into 3 letter boxes a, b, c if letter box a must contain At-least 2 letters=0 Ways