3/3 x 1/5 = 3/15
3/3 = 1/1 = 1
Answer: 1
1/5 = 3/15
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15 choose 3 = 15!/(3!*(15-3)!) = 15!/(3!*12!) = (15*14*13)/(3*2) = 5*7*13 = 455
There are 15 because 15/5 = 3
183. 15*12 +3 =183
1, 3, 5, 15
15 of them because 15/5 = 3