A bag of numbers contains 18 numbers from 1 to 18. A number is randomly picked out of the bag and after which another number is picked out. Calculate the probability of both numbers being odd.
1. 8/90
2. 7/65
3. 6/36
4. 4/17
5. 3/19
1. 8/90
2. 7/65
3. 6/36
4. 4/17
5. 3/19
Correct Answer – Option 4 : 4/17
Given:
18 numbers = 1 to 18
Calculation:
Number of odds in 1 to 18 = 9
⇒ Probability of picking out odd in first draw = 9/18
⇒ Probability of picking out odd in second draw = 8/17
⇒ Required probability = (1/2) × (8/17)
∴ Required probability is 4/17