Question:
Mark the correct alternative in each of the following:
If a digit is chosen at random from the digit 1, 2, 3, 4, 5, 6, 7, 8, 9, then the probability that it is odd, is
(a) $\frac{4}{9}$
(b) $\frac{5}{9}$
(c) $\frac{1}{9}$
(d) $\frac{2}{3}$
Solution:
GIVEN: digits are chosen from 1, 2, 3 4, 5, 6, 7, 8, 9 are placed in a box and mixed thoroughly. One digit is picked at random.
TO FIND: Probability of getting an odd digit
Total number of digits is 9
Digit that are odd number are 1,3,5,7,9
Total number of odd digits is 5
We know that PROBABILITY = 
Hence probability of getting an odd digit is 
Hence option
is correct