A box is filled with 11 blue cards, 2 green cards, and 7 brown cards. A card is chosen at random from the box. What is the probability that it is a blue or a brown card? Write your answer as a fraction in simplest form

Question

Tyshawn Ochoa

Mathematics

24 September, 21:45

A box is filled with 11 blue cards, 2 green cards, and 7 brown cards. A card is chosen at random from the box. What is the probability that it is a blue or a brown card? Write your answer as a fraction in simplest form

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Answers (1)

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Santos Mccormick · Answer 1

11 blue

2 green

7 brown

total is 20 card

7 out of that 20 are brown

so x out of 100% are brown

7/20=x/100 - cross multiply

700=20x

x=700/20

x=70/2