=P(Urn‌B)=P(Urn‌C) Now, probability of drawing a white ball from each Urn Urn A 6 white balls, 2 black balls. Total = 8 balls P(‌ White ‌∕‌ Urn ‌A)=‌
6
8
=‌
3
4
Urn B 5 white balls, 3 black balls Total = 8 balls P(‌ White ‌∕‌ Urn B ‌)=‌
5
8
Urn C 4 white balls, 4 black balls Total =8 balls P(‌ White ‌∕‌ Urn C ‌)=‌
4
8
=‌
1
2
So, the total probability of drawing a white ball is ‌P(‌ White ‌)=P(‌ White ‌∕‌ Urn ‌A)⋅P(‌ Urn ‌A) ‌+P(‌ White ‌∕‌ Urn ‌B)⋅P(‌ Urn ‌B) ‌+P(‌ White ‌∕‌ Urn ‌C)⋅P(‌ Urn ‌C) ‌=‌