30 friends go out to watch a movie.15 have rs.50 and 15 have rs.100 Movie ticket costs for rs.50 In how many ways can 30 tickets be bought
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1 way is that 15 people will pay 100 rs
2nd way 14 people will pay 50 rs and 8 people will pay 100rs
3rd way is that 12 people will pay rs 50 and 9 people will pay 100 rs
4th way is that 10 people will pay rs 50 and 10 people will, pay rs 100
5th way is that 8 people will pay rs 50 and 11 people will pay rs 100
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