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 1 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?
Options:	A) 1/8	B) 1/16	C) 1/32	D) 1/64	E) 1/128
There are 8*8= 
<gadget id="calculator">8*8</gadget>
<output>64</output>
64 possibilities.   Bob has 2 chances so the probability is 2/64= 1/32.   The answer is 1/32.
<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 1 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?