The numbers on a six sided die are 1, 2, 3, 4, 5, 6.
Odd numbers are numbers that cannot divide 2 completely. Thus, the odd numbers here are 1, 3 and 5
Probability is expressed as
Number of favourable outcomes/total number of possible outcomes
The total number of possible outcomes is 6
The number of favourable outcomes is 3
Thus, the probability of rolling an odd number is
3/6 = 1/2
Thus, if the die is rolled 242 times, then the number of times you would expect an odd number to appear is
1/2 * 242 = 121 times