A grandfather had a big bundle of hundred - rupee notes. He wanted to give his 3 grandsons some pocket money during the 10 days of Dushera. On the first day he gave them a total of three notes, on the second day a total of four notes and so on. (On the nth day he gave them a total of n + 2 notes.) If on each day, each grandson got at least one note, in how many ways could the grandfather have given the notes?
plz give approach

1) 11c2
2) 12c2
3) 12c3
4) non of these