Man has 53 socks in his drawer; 21 identical blue, 15 identical black and 17 identical red. The lights are fused and he is completely in the dark. How many socks must he take out to make 100 per cent certain he has a pair of black socks ?
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39 PAIRS..........................
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85 should be taken out
Because he has 15 socks which are black are you here
To get hundred percent black socks
100-15 equals 75
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