Question

A customer forgets a 4-digit code for an automatic teller machine (a. T. M.) in a bank. However, he remembers that this code consists of digits 3, 5, 6 and 9. Find the largest possible number of trials necessary to obtain the correct code. Select one:

a. 12

b. 24

c. 36

d. 48

Answer 1

Answer:

answer is 36..................