How many different 6 digit palindromes can be formed using the digits 7 8 or 9
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Step-by-step explanation:
o form a palindrome of 6 digits, what we can change is first 3 digits. Because the rest of the digits are automatically placed.
For suppose abc are the first 3 digits we have cba as the rest of digits which makes it a palindrome.
Given only 3 digits (7,8,9) and 3 places we can make 3*3*3 different numbers i.e., 27.
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