Use reasoning to answer the following question.
Chalktown High School had their prom last weekend. There were 123 students who attended. If 3 students attended on their own, how many couples came to the prom?

60
There were 123 students – 3 single attendees = 120 students in couples.

120 students / 2 in a couple = 60 couples.

.

Therefore, the answer is 60