dobby has30red,22gold,14black what is probablity he get match pair socks?
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here is the answer........
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N = total=66.
probability of getting a pair of matching color = ( 30*29 + 22×21 + 14*13)/ (66*65)=
probability of getting a pair of matching color = ( 30*29 + 22×21 + 14*13)/ (66*65)=
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