There are 247 groups comprising 2 or more students.
they can be 2 groups of 16, 4 groups of 8, 8 groups of 4, or 16 groups of 2
2.33333333
There are five ways to do this, if you include 32 'groups' with one member each.The others are 2 groups of 16, 4 groups of 8, 8 groups of 4 and 16 groups of 2.
75
You could have 15 groups, with 1 coach and 2 students in each group.Out of the 50 participants, 90% would be active . . . only five studentswould be left out.
20 x 19 x 18/3 x 2 = 1,140 groups
2 groups. 2 x 3= 6
23 x 22 x 21 x 20/4 x 3 x 2 = 8,855 groups
they can be 2 groups of 16, 4 groups of 8, 8 groups of 4, or 16 groups of 2
2.33333333
most students have at least 3 dogs
Infinitely many.
30C8 = 5,852,925
There are only two possibilities... 10 groups of 2 or 5 groups of 4. Unless - you can have varying sized groups - which you didn't specify.
There are five ways to do this, if you include 32 'groups' with one member each.The others are 2 groups of 16, 4 groups of 8, 8 groups of 4 and 16 groups of 2.
if order does not matter then, (23x22x21x20x19)/(5x4x3x2x1) = 33,649
17.0588