Problema Solution
you have 23 children in your class room.If everyone sends everyone a valentine,how many total valentines would that be
Answer provided by our tutors
we need to find the number combinations of 2 elements in a set of 23 elements:
C(23, 2) = 23!(2!(23 - 2)!) = 23!/((2! 21!) = 22*23/2 = 11*23 = 253
the answer is 253 total valentines.