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Class 10 > Learn Mathematics > A bag contains 10 red, 5 blue and 7 green balls. A...
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A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball being not a blue ball.

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Total ball is 22. probability of 1 balls is drawn of 22 balls = 22c1 probability of no blue ball = 10c1+7c1/22c1 Ans is 17/22 Thank you.
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Teacher

There are 22 balls in all. There are 5 blue balls. So probability of drawing a blue ball is 5/22 Hence the probability of not drawing a blue ball is 1-5/22 = 17/22 Ans
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17/22
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Given that- as 1 ball is drawn from 22 balls then ways to drawn a ball =22C1=22 ways to drawn a blue ball =5C1=5 probability to drawn 1 blue ball =P= 5/22 probability to drawn not to blue ball =1-P=1- 5/22 =17/22. Ans will 17/22 Think...
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Given that- as 1 ball is drawn from 22 balls then ways to drawn a ball =22C1=22 ways to drawn a blue ball =5C1=5 probability to drawn 1 blue ball =P= 5/22 probability to drawn not to blue ball =1-P=1- 5/22 =17/22. Ans will 17/22 Think u understood ... read less
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Mathematics educator with 7 years of experience as a school educator as well as a tutor.

P (getting not a blue ball) = total balls except blue ball/total no. of balls. = 17/22.
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Knowledge Builder

17/22
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