A Four digit safe code does not contain the digits 1 and 4 at all. What is the
probability that it has at least one even digit?

• 15/16
  
  Probability of having all digits odd = 1/2* 1/2 *1/2 * 1/2 = 1/16
  probability that it has at least one even digit = 1-1/16 = 15/16
• 12 years agoHelpfull: Yes(1) No(2)