Question 19
Technothlon'16 Prelims Discussion Forum :: Technothlon 2016 :: Technothlon Hauts :: RASTAPOPOULOS’S ARMY CAMP
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Question 19
Question 19:
Rastapopoulos had announced that it would issue six-digit identity numbers to all his soldiers using numbers 0 through 9. If each number has to differ from every other number in at least two places. What is the highest population the island can have?
a) 99999 b) 100000 c) 999999 d) None of these
Rastapopoulos had announced that it would issue six-digit identity numbers to all his soldiers using numbers 0 through 9. If each number has to differ from every other number in at least two places. What is the highest population the island can have?
a) 99999 b) 100000 c) 999999 d) None of these
Re: Question 19
Answer keys are available on Technothlon downloads page.Type your score here accordingly.
All the best- Guest
Correction in Answer Key
In the question, it is clearly stated that the identity numbers shoud be six digits long.
I feel that you have failed to consider that in your solution.
By that logic the first digit cannot be zero.
Therefore, the total number of ways should be 9x10x10x10x10 = 90000
Therefore, the answer should be d) None of these and not what is given in the answer key.
I feel that you have failed to consider that in your solution.
By that logic the first digit cannot be zero.
Therefore, the total number of ways should be 9x10x10x10x10 = 90000
Therefore, the answer should be d) None of these and not what is given in the answer key.
Participant- Guest
Technothlon'16 Prelims Discussion Forum :: Technothlon 2016 :: Technothlon Hauts :: RASTAPOPOULOS’S ARMY CAMP
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