Solution:Given that cards bearing numbers 1,3,5,7, ..........., 35 are kept in a bag.
We have to find the probability that when a card is drawn, it is bearing an odd number.
Probability of an event E is defined as:
Since the cards are bearing numbers 1,3,5,7 ..........., 35, therefore, the sample space are,
The total number of possible outcomes is 18.
Cards bearing odd numbers are:
Hence, the number of favorable outcomes is 18.
Let be the event of getting a card bearing an odd number.
Now, the probability of getting a card bearing an odd number is:
The probability of getting a card bearing an odd number is 1.
Therefore, option 1 is correct.