Question 131195
We want to know the different Combinations of 3 of the 5 kids there can be.
n=5, r=3,
nCr={{{n!/((n-r)!*r!)}}}
5C3={{{5!/((5-3)!*3!)}}}
={{{(5*4*3*2*1)/((2*1)(3*2*1))}}}
={{{(5*4)/2}}}
=10 different ways
.
Ed