Math
posted by Pia on .
Jackie and two friends are drawing from a bag that contains savings cards for a popular store. There are twenty 10% off cards, ten 15% off cards, six 20%off cards, and four 50% off cards. What is the probability that jackie will choose a 50 % off card as her third choice? Assume that her friends did not draw a 50% off card?

Total number of cards left
=20+10+6+4  2
=38
Number of 50% off cards
= 4
Therefore probability of drawing a 50% off card
= 4/38
= ? 
???? i want heeeeelllpppppp!!!

Cow utter

4 3 12 2
 *  =  = 
38 3 114 19 
=20+10+6+4
=40 cards
= Friends 2 cards
=38 cards
=4 50%
=P 4/38, 1/19