Ms. Petersons class sold flower seeds. on the first day she sold 10 on the second day she sold 15 on the third day she sold 10 o
n the forth day she sold 30on the last day she sold 2. what is the difference between the least number of packets sold in one day and the greatest number of packets sold in one day.
There are 21 ways to choose the first person, 20 ways to choose the second, 19 ways for the third and 18 ways for the fourth so the answer is 21 * 20 * 19 * 18 = 143640.
