Let E be the set of all integers with 1 at their unit places. The probability that a number chosen from {2, 3, 4, ............, 50} is an element of E, is ?
5/49
4/49
3/49
2/49
Correct Option: B
n(S) = 49 Favourable numbers are 11, 21, 31, 41. ∴ Required probability = 4/49
