Some four-digit numbers, such as 3003 and 6226, read the same forward and backward. If a boy selects a number from all four-digit numbers, find the probability that it will read the same forward and backward.

There are 90 palindrome numbers (which reads the same forward and backward) present between 1000-9999. They are 1001; 1111; 1221; 1331; ... 1001; 1111; 1221; 1331; ... to 9669; 9779; 9889; 9999; 9669; 9779; 9889; 9999

Therefore, the probability of selecting such number =[tex]\frac{90}{9000} = \frac{1}{100}[/tex]

Some four​-digit ​numbers, such as 3003 and 6226​, read the same forward and backward. If a boy selects a number from all four​-digit ​numbers, find the probability that it will read the same forward and backward.

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Some four-digit numbers, such as 3003 and 6226, read the same forward and backward. If a boy selects a number from all four-digit numbers, find the probability that it will read the same forward and backward.