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

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



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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Re: A palindrome is a number that reads the same forward and backward. For [#permalink]
11 Dec 2017, 23:44
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