1.

A bag contains 3 red and 5 black balls and a second bag contains 6 red and 4 black balls. A ball is drawn from each bag. The probability that one is red and other is black, is [AISSE 1986]

A.                 \[\frac{3}{20}\]    
B.                 \[\frac{21}{40}\]
C.                 \[\frac{3}{8}\]       
D.                 None of these
Answer» C.                 \[\frac{3}{8}\]       


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