A four digit number (numbered from 0000 ...

A four digit number (numbered from 0000 to 9999) is said to be lucky if sum of its first two digits is equal to the sum of its last two digits. If a four digit number is picked up at random then the probability that it is lucky number is :-

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ARIHANT MATHS-PROBABILITY-Exercise (Questions Asked In Previous 13 Years Exam)

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