Question

A father with $6$ children takes $3$ at a time to a park without taking the same set of children. How often each child goes to the park?

• A. $10$
• B. $12$
• C. $15$
• D. $20$

Answer 1

The correct option is A $10$

Father is supposed to take 3 children to the park but he can not same set of children for more than one time

Here we have to find the number of times for which one child will go to the park i.e fix one and choose 2 from 5

So total number of times are ${5C}_2$ = 10