In how many different ways can 15 tickets to a football game be distributed among a class of 30 students if each students gets at most one ticket?
Use "^{30}C_{15}", unless the tickets have designated seating in which case you can use "^{30}P_{15}"
The value of "^{30}C_{15}=155,117,520"
"^{30}P_{15}=2.0284320439\\times 10^{20}"
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