A cashier wants to work five days a week, but he wants to have at least one of Saturday and Sunday off.
How many ways can he choose the days he will work?
2026-04-09 03:27:28.1775705248
Days that cashier will work
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Hint: Split up the problem into easier cases. If the cashier wants the whole weekend off, there is $1$ way only. How many ways with Saturday off but not Sunday? How many with Sunday off but not Saturday? Add the three numbers.