A bag contain 8 blue balls, 7 green balls and 5 red balls.What is the probability that the ball is red?
2 answers:
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To determine how much of the wall is blue we first need to find its area. The wall is a rectangle, then its area is the product of its height and length:
Hence, the area of the wall is 140 square ft. To determine how much of the wall is already painted we multiply this by 1/2, then:
Therefore, 70 square ft are blue.