Question

hey, can anyone please verify to me if this is right or not, and if its not right, then could you please help me with getting the right answers? (please show work on how to get the answers please, thank you).

Answer 1

The card one is 4/52 for kings but then 20/51 because you take a card the first time and you do not replace it.
The marbles is 1/4 chance. 10 green 10 not. For ball 1 it’s a 1/2 (50:50) chance of picking green. that’s reduce because you want to pick 2 green balls (25% chance)

Answer 2

4/52*20/51

9/38

Explanation:

For the first one

4/52*20/51

4/52 - 4 kings out of 52 cards and 5*4=20 numbered cards (1, 3, 5, 7, 9) out of 51 cards (one taken at first step)

For the second one

10/20*9/19= 90/380=9/38

10 green out of 20 marbles, then 9 green out of 19 marbles (one green taken at first step)