Question

A father with eight children takes three at a time to the zoological garden, as often as he can without taking the same three children together more than once. how often will he go and how often will each child go

Answer 1

father will go as often as he gets to pick 3 children from the 8 satisfying the above conditions, i. e number of combinations of 3 children from available 8 which is equal go 8c3= 56 times.

For each child we need to find combination of other 2 children from the remaining 7.
for child answer is 7c2= 21 Times.