We can see that for the first rule (index #63), {bottled water} and {tropical fruit} appear together in the same transaction in two different transactions (2 and 3), therefore the support for that rule is 2/10 or 20%
The last rule shown, rule (index #3) has a support of 0.10, since soda with rolls/buns only appears once in the 10 transactions (1/10)
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