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Let n_(1)and n_(2) be the number of red and black balls, respectively, in box I. Let n_(3) and n_(4) be the numbers of red and black balls, respectively, in the box II. One of the two boxes, box I and II, was selected at random and a ball was drawn randomly our of this box. The ball was found to be red. If the probability that this red with the possible values of n_(1),n_(2),n_(3)and n_(4) is (are) |
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Answer» `n_(1)=3,n_(2)=3,n_(3)=5, n_(4)=15` ` "Box" IltBlack ton_(2)` `Red to n_(3)` `"Box II"lt"Black" to n_(4)` `P(R)=1/2.(n_(1))/(n_(1)+n_(2))+1/2.(n_(3))/(n_(3)+n_(4))` `P (II//R) =(1/2(n_(3))/(n_(3)+n_(4)))/(1/2(n_(1))/(n_(1)+n_(2))+1/2.(n_(3))/(n_(3)+n_(4)))` `((n_(3))/(n_(3)+n_(4)))/((n_(1))/(n_(1)+n_(2))+(n_(3))/(n_(3)+n_(4)))` by OPTION `n_(1)=3,n_(2)=3,n_(3)=5,n_(4)=15` `P(II//R)=(5/20)/(3/6+5/20)=(1/4)/(1/2+1/4)=1/4xx(4)/(2+1)=1/3` ALSO, when `n_(1)=3, n_(2),=6,n_(3)=10, n_(4)=50,P(II//R)=1//3` |
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