Question

A bag A bag contains pens numbered from 1 to 17. A pen is drawn and replaced.Then one more pen is drawn and replaced. what will be the probability that frist pen drawn is even and second one is odd ?

Answer 1

Answer:

7by 13 for odd number and 8by13even number

Answer 2

Step-by-step explanation:

1) If we drawn 1 pen then probability of it's even is 8/17.

2) Now we replace it

3) Now the total number of pen is again 17

4) The probability of second pens is odd is 9/17

5) The condition of first pen is even and second pen is odd is (8/17)*(9/17)

6 ) The answer is 72/289