Question

A bag contains 5white and 7red and 8 black balls find the probability that the ball drawn is not a black? ​

Answer 1

Answer:

3:5 is the probability

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Answer 2

Answer:

10th

Maths

Probability

Introduction to Theoretical Probability

A bag contains 5 white, 7 r...

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Asked on December 27, 2019 by

Piroj Rawat

A bag contains 5 white, 7 red and 8 black balls. If four balls are drawn one by one with replacement. What is the probability that at least one is white?

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ANSWER

Given 5-white balls

7-red balls

8-black balls

P(no while)

=

20

C

1

15

C

1

×

20

C

1

15

C

1

×

20

C

1

15

C

1

×

20

C

1

15

C

1

=(

20

15

)

4

=(

4

3

)

4

=

256

81

P (at least one white ball ) = 1-P(no white ball)

=1−

250

81

=

256

125

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