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QUESTION
Find the probability of the code of having the same letters?
A three character code uses two letters. Either letters can repeat. Find the probability of the code QDQ. Find the probability of code having the same letters.
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** *** *** ** ****** same ******* ** *** can **** **** 26pairs ***** *** ** **** **** ** 26 **** also ** digit can ********** ** P(101)WAYS=10thus ***** ways =26)(10)=260 ****