Question

You have 4 children from a group of 6 boysvand 4 girls how many can this done such that at least 1 boy is part of selected group

Answer 1

Answer:

by ap arithematic progression

Answer 2

Answer:

We have to select 4 children out of 6 boys and 4 girls such that we have atleast one 1 boy always in the group.

So, the cases could be

1) 1 boy - 3 girls

Which can be done as - 6C1*4C3

2) 2 boys - 2 girls

Which can be done as - 6C2*4C2

3) 3 boys - 1 girl

Which can be done as - 6C3*4C1

4) 4 boys - 0 girls

Which can be done as - 6C4*4C0

So, the total favourable cases will be an addition of all of these !

Hope this helps you !