EMP Q.10

10There are two bags one of which contains :3 black and 4 white balls while other contains 4 black and:3 white balls. A dies is cast, if the face 1 or 3 t.urns up, a ball is taken from first bag and if any other face turns up, a ball is chosen from second bag. The probability of choosing of black ball is

Option : A
Explanation : Let E₁ be the event that a ball is drawn from
first bag, E₂ the event that a ball is drawn
from second bag and E the event a black ball
is chosen, therefore

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