Ten pairs of shoes are in a closet. Four shoes are selected at random. The probability that there will be at least one pair among the four shoes selected is _______
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a
0.3065
b
0.1065
c
0.5132
d
0.0365
answer is A.
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Detailed Solution
P( Req )=1−P (no pair selected) =1−2020⋅1819⋅1618×1417=1−224323=99323=0.3065