Question

Victoria selects a card at random from a box of blank greeting cards. The box has 6 "Happy Birthday" cards, 12 "Thank You" cards, and 2 "Get Well Soon" cards. What is the probability that she selects a "Happy Birthday" or "Get Well Soon" card? A.8% B.10% C.40% D.88%
Pleaseee help -.-

Answer 1

First you need to know how many cards there are total: 6+12+2=20.
Now how many of the cards are "target" cards that you care about picking? 6+2=8

Therefore, if you pick a random card, the change of picking one of the targets is 8/20, or 40% (C)

Answer 2

How many cards are there total? Use it as a proportion. Number of Happy Birthday and Get well Soon cards/total number. Cross multiply against x/100 to get percentage

Answer 3

Thanks :D