Question

Seven different objects must be divided among three persons. In how many ways this can be done if at least one of them gets exactly one object

Answer 1

Answer:15 ways

Step-by-step explanation:

1 st assume the persons be x,y,z.

The required condition can be written in the form of an equation ....

x+y+z=7

Each should get atleast one so,the equation becomes

x+y+z=4

By using the formulae C(n+r-1,r)

We get 6 C 4 which is 15.

n=no.of distinct things or persons

r=no.of objects.