binskyba

Thank you very much!

At a certain financial institution, 30% of the clients use both credit card and a cheque book, but 40% of the clients who use the credit card do not use the cheque book. What percentage of the members of the institution use the credit card? A. 35 B. 40 C. 50 D. 65 E. 75 Pleas help me and give me a nice explanation, of course an explanation which takes less than 2 min. to do. THNKS