Question

A shop  accepts either a Visa card or a Master card. A total of 24% of its customers have only Visa card ,61% have only Master card and 11% have both. What per cent of  the shop's customers have a card accepted by the shop?

Answer 1

Shops customers :
24 % of total customers have ONLY visa card
61% of total customers have ONLY master card
11% of total customers have both cards

So 24+61+11 = 96 % of total customers have at least one card and that is accepted by the Shop.

96%

remaining 4% of the shop's customers may be paying through cash or some other way.