I have no idea how to go about solving number 2. I think I figured out part a but everything else is very confusing. I just learned the formulas nPr and n!/(n−r)! for non repeating objects and n!/r1!r2!r3!... for repeating objects. But I don't know how to use these formulas to apply to question 2.
Any help would be so so so appreciated.
Any help would be so so so appreciated.
