Example 33
Last updated at Dec. 8, 2016 by Teachoo
Transcript
Example 33 Coloured balls are distributed in four boxes as shown in the following table: A box is selected at random and then a ball is randomly drawn from the selected box. The colour of the ball is black, what is the probability that ball drawn is from the box III? We need to find out the Probability of the ball drawn is from box III if it is black. i.e. P(E3|A) P(E3|A)= 𝑃 𝐸3.𝑃(𝐴|𝐸3)𝑃 𝐸1𝑃 𝐴|𝐸1+𝑃 𝐸2𝑃 𝐴|𝐸2+𝑃 𝐸3𝑃 𝐴|𝐸3+𝑃 𝐸4𝑃(𝐴|𝐸4) . = 128 124 + 116 + 128 + 113 = 0.165 Thus, required probability is 0.165
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Example 33 You are here
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About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He provides courses for Mathematics from Class 9 to 12. You can ask questions here.