Need help in probability question

CPT 464 views 1 replies
1)If four couples are placed in a room, two are
selected at Random the probability that the two
were a gentlemen and lady but not a couple
 
a)3\7 b)4\7 c)1\7 d) None
 
2) A committee of 5 members is to be selected
from 8 boys and 3 girls the probability that in
which 2 particular girls include
a)2\30  b)12\11  c)2\11  d)8\9
 
Replies (1)
1) [(4C1 x 4C1) - 4C1] / 8C2 = 12/28 = 3/7 2) (2C2 x 9C3) / 11C5 = 2/11


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