A supermarket has seven checkout lanes. All seven checkouts accept cash payments but only lanes 1 to 4 allow credit cards. Kath, Kim and Sharon are all shopping and Kim insists on using her credit card while Kath and Sharon intend to pay cash. In how many ways could they choose their checkout lanes? (More than one could choose the same lane).

1

Answers

2015-05-12T23:51:07+05:30
more than one can choose the same lane

7 * 7 * 4 = 196,
0