Jessica has a set of 12 good friends. When planning her wedding, she must choose 3 bridesmaids of her 12 friends. How many subsets of size 3 are there?
a.36
b.1320
c.1728
d.220

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

Pam buys a sleeve of ball bearings for her skateboard. each of the bearings is 1 1/5 inches wide. the sleeve is 9 3/5 inches long. how many ball bearings are in the sleeve? show your work.

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers