How many two digit odd numbers can be formed from the digits 1 2 3 4 5 and 8 if repetition of digits...........

Quantitative Aptitude ( CCS) Permutation & Combination

How many two-digit odd numbers can be formed from the digits 1,2,3,4, 5 and 8, if repetition of digits is allowed?

Well, the first digit can be 1, 2, 3, 4, 5 or 8
Since the numbers are odd, the second digit can only be 1, 3, or 5.
So you have 6×3=18 combinations.

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Munesh Kumari

the correct answer is 6 x 3=18

11,13,15 21,23,25 31,33,35 41,43,45 51,53,55 81,83,85 18 two digit odd numbers are formed

number 8 was excluded in the answer

8 is also given in the question so the answer becomes 6*3=18combinations

8 is also given in the question so the answer becomes 6*3=18combinations