What is the maximum number of false trials that can be made before the lock is opened?
Choose the correct choice from the following.
A) 3*26C6  B) (26C6)3  C) 26C6. 3!  D) 215  E) 235
Maximum possible permutation of letters= 6*6*6= 
<gadget id="calculator">6*6*6</gadget>
<output>216</output>
216   Out of 216 different permutations only 1 is correct.   Maximum number of false trials= 216-1= 
<gadget id="calculator">216-1</gadget>
<output>215</output>
215   ANSWER:215
<result>D</result>
What is the maximum number of false trials that can be made before the lock is opened?