If a number N is chosen at random from the set of two-digit integers whose digits are both prime numbers, what is the probability T that N is divisible by 3?	Choices:	A) 1/3	B) ¼	C) 9/25	D) 5/16	E) 0
Prime digits are: 2, 3, 5, 7   Total number of 2 digit #s with both digits prime are:   4*4= 
<gadget id="calculator">  4*4</gadget>
<output>16</output>
16   out of these numbers divisible by 3= 33, 27, 57, 72 and 75. I had to find the numbers manually using the 4 numbers above.   =&gt; prob = 5/16.   Ans D. Took me 3:20 mins.
<result>D</result>
If a number N is chosen at random from the set of two-digit integers whose digits are both prime numbers, what is the probability T that N is divisible by 3?