Answer of Q13 final exam
At this question, why I have used 52 for both trials, doesn't it be 51 for the second trial as I keep the ball out of the bowl, so the number of balls I drag from decrease by one.
Hey Omar,
Thank you for reaching out!
I am not sure I understand your question in the context of this exercise. You are referring to the problem where there are 42 black balls and 12 white ones inside a bowl, correct?
Kind regards,
365 Hristina
Yes
Hey again Omar,
You need to consider
1. the number of ways in which you can choose 1 black ball from 42,
2. the number of ways in which you can choose 1 white ball from 12,
3. and the number of ways in which you can choose 2 balls from a total of 54.
Please, refer to the explanation of the correct answer for a more in-depth solution.
Kind regards,
365 Hristina
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