Question

In the above problem, what is the probability
of pulling out a red marble in the first case,
not replacing it and pulling out a purple
marble in the second case?​

Answer 1

Answer:

Total number of marbles=2+9+18+10+7=46

The probability of pulling out a red marble in the 1st case= 2/46=1/23

Now that one marble has been pulled out, total number of marbles=45

Then probability of pulling out a purple marble in the 2nd case= 10/45=2/9

So the probability of pulling out a red marble in the first case and not replacing it and pulling out a purple marble in the 2nd case= 1/23 * 2/9