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If E be the set of all integers with 1 in their unit place. The probability that a number chosen {2, 3, 4,...50} is an elements of E, is?

5/49
4/49
3/49
2/49

Correct Answer: 4/49

Explanation:

Favourable numbers are 11, 21, 31, 41.
∴ Required probability = 4/49

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