Question

a bag contains 5 green, 8 red, and 7 white balls. one ball is drawn at random from the ball.find the probability of getting : a white ball or a green ball

Answer 1

total no of balls= 5+8+7=20
no. of green balls = 5
no of red balls= 8
no of white balls= 7
number of white balls+ number of green balls = 5+7=12
probability= no of favourable outcomes/total no of outcomes
therefore probability becomes= 12/20= 3/5

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