Question 335715
3C1 ways to choose the National Chain, then there are 7C4 combinations to choose 4 jellies out of th 7 (combinations used since order is not important)
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total =(3C1)*(7C4)=3*140=420
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if for some strange reason, order of the jellies was important then
Total =(3C1)*(7P4)=3* 840=2520,  where 7P4 is permutations of 4 items selected from 7 items.