Question 366803
Show all work. Mary purchased a package of 18 different plants, but she only needed 12 plants for planting.  In how many ways can she select the 12 plants from the package to be planted?

No. of ways = (18*17*16*15*14*13*12*11*10*9*8*7/12!
            = 18,564

There are 18,564 ways Mary can select the 12 plants from the package to be planted