Dhruba Dasgupta
Dhruba Dasgupta
8 years ago

A locker at the world famous WTC building can be opened by dialing a fixed three digit code(between 000-999).Don only knows the number is a three digit number and has only one six.Using this info he tries to open the locker by dialing at random.The probability that he succeeds in his endevour is

A. 1/243

B. 1/900

C. 1/1000

D. 3/216


This Question Belongs to User Ask Question >> Miscellaneous

Join The Discussion

Comments ( 4 )

  1. Ankit Rajpoot
    Ankit Rajpoot :
    7 years ago

    We hv to find out total 3 digit number which hv only one '6' digit so as we know the total digit formula ,

    (9*9*1)*3=243 (here we multiply 3 bcoz '6' can be 1st,2nd & 3rd position )
    now we hv to select only one number out of 243 digit thats why Answer is

    A. 1/243

  2. Ankit Rajpoot
    Ankit Rajpoot :
    7 years ago

    Option A is correct In my previous comment I gve wrong choice

  3. Ankit Rajpoot
    Ankit Rajpoot :
    7 years ago

    Option is C

  4. Sudhakar Prajapati
    Sudhakar Prajapati :
    8 years ago

    Answer = A (1/243)

Related User Ask Questions