A telephone number contains 10 digit, including a 3-digit area code. Bob remembers the area code and the next 5 digits of the number. He also remembers that the remaining digits are not 0, 1, 2, 5, 6, or 7. If Bob tries to find the number by guessing the remaining digits at random, the probability that he will be able to find the correct number in at most 2 attempts is closest to which of the following?
Choose one:  A) 1/2  B) 1/4  C) 1/8  D) 1/16  E) 1/32
There are 4*4= 
<gadget id="calculator">4*4</gadget>
<output>16</output>
16 possibilities.   Bob has 2 chances so the probability is 2/16= 1/8.   The answer is 1/8.
<result>C</result>
A telephone number contains 10 digit, including a 3-digit area code. Bob remembers the area code and the next 5 digits of the number. He also remembers that the remaining digits are not 0, 1, 2, 5, 6, or 7. If Bob tries to find the number by guessing the remaining digits at random, the probability that he will be able to find the correct number in at most 2 attempts is closest to which of the following?