There are two urns. There are m white & n black balls in the first urn and p white & q black balls in the second urn. One ball is taken from the first urn & placed into the second. The probability of drawing a white ball from the second urn is –
Text Solution
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A ball from first urn can be drawn is two mannars
ball is white or ball is black
P(w) = 
P(b) = 
Let E → selecting a white ball from second urn after a ball from urn first has been placed into it
P(E) = P(w) P(E/W) + P(b) P(E/B) = 
× 
+ 
= 
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