Question

Find the probability of drawing a pink card, not replacing it, and then drawing another pink card.

Answer 1

http://media01.owotw.com/g_alg01_2011/11/cards2.jpg

Answer 2

\(\Large \color{Black}{\Rightarrow {4 \over 10} \times {3 \over 9} }\)

Answer 3

Because when we don't replace it we have a card less.

Answer 4

And that's why I've reduced one in the denominator.

Answer 5

\(\Large \color{Black}{\Rightarrow {2 \over 5} \times {1 \over 3} = {2 \over 15} }\)

Answer 6

there are 10 cards...4 pink cards...the first probability will be 4/10

the second probability will be 3/9 because there will only be 3 pink cards left (since one of the cards has already been drawn) and 9 because one of the cards has already been drawn