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A palindrome is a number that reads the same forward and backward. For

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A palindrome is a number that reads the same forward and backward. For  [#permalink]

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New post 06 Sep 2017, 02:36
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A palindrome is a number that reads the same forward and backward. For example. 2442 and 111 are palindromes.If a number is selected at random from 1 to 1000.What is the probability that the number is a palindrome number?

Sorry I dont have options for this

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Re: A palindrome is a number that reads the same forward and backward. For  [#permalink]

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New post 06 Sep 2017, 02:58
DH99 wrote:
A palindrome is a number that reads the same forward and backward. For example. 2442 and 111 are palindromes.If a number is selected at random from 1 to 1000.What is the probability that the number is a palindrome number?

Sorry I dont have options for this


- Two-digit palindrome : 9X1 = 9. First 9 calculates possibilities of 9 possible number from 1-9.
- Three-digit palindrome : 9*10*1 = 90. First 9 calculates possibilities of 9 possible number from 1-9, second 10 calculates all of the second digit possibilities. We can use 10 numbers from 0 to 9.
- Total probability : \(\frac{(9+90)}{1 to 1000 inclusive} = \frac{99}{1000}\).

What is the answer?
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Re: A palindrome is a number that reads the same forward and backward. For  [#permalink]

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New post 06 Sep 2017, 03:14
septwibowo wrote:
DH99 wrote:
A palindrome is a number that reads the same forward and backward. For example. 2442 and 111 are palindromes.If a number is selected at random from 1 to 1000.What is the probability that the number is a palindrome number?

Sorry I dont have options for this


- Two-digit palindrome : 9X1 = 9. First 9 calculates possibilities of 9 possible number from 1-9.
- Three-digit palindrome : 9*10*1 = 90. First 9 calculates possibilities of 9 possible number from 1-9, second 10 calculates all of the second digit possibilities. We can use 10 numbers from 0 to 9.
- Total probability : \(\frac{(9+90)}{1 to 1000 inclusive} = \frac{99}{1000}\).

What is the answer?

i think we will have to consider 1 to 9 also .. what do u think // answer will be 108/1000
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Re: A palindrome is a number that reads the same forward and backward. For  [#permalink]

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New post 06 Sep 2017, 08:32
septwibowo wrote:
DH99 wrote:
A palindrome is a number that reads the same forward and backward. For example. 2442 and 111 are palindromes.If a number is selected at random from 1 to 1000.What is the probability that the number is a palindrome number?

Sorry I dont have options for this


- Two-digit palindrome : 9X1 = 9. First 9 calculates possibilities of 9 possible number from 1-9.
- Three-digit palindrome : 9*10*1 = 90. First 9 calculates possibilities of 9 possible number from 1-9, second 10 calculates all of the second digit possibilities. We can use 10 numbers from 0 to 9.
- Total probability : \(\frac{(9+90)}{1 to 1000 inclusive} = \frac{99}{1000}\).

What is the answer?



Sorry I dont know the answer
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Re: A palindrome is a number that reads the same forward and backward. For  [#permalink]

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New post 11 Dec 2017, 23:44
It is mentioned as from 1 to 1000, but not sure if it is inclusive

If inclusive, answer will be = 108/1000

if not inclusive, answer will be = 107/998

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
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Re: A palindrome is a number that reads the same forward and backward. For &nbs [#permalink] 11 Dec 2017, 23:44
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