Dobby the house-elf has dropped all his socks on the floor in the middle of the night! He has 30 red socks, 22 gold socks and 14 black socks. How many socks would he have to pick up before getting a matching pair?
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he have 3 types of socks. so first 3 socks picked by him could be of different colour. so 4th socks picked by him can match atleast 1 pair...so he needs to pick up 4 socks atleast. ANS: 4
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Solution:-
Dobby has three different types of socks. First type is of red colour, second type is of gold colour and the third type is of black colour. The first, second and third socks that he picks, may be of three different colours but the the fourth one will definitely match with one of the socks that he has already picked up.
So, he has to pick up atleast 4 socks before getting the matching pair.
Dobby has three different types of socks. First type is of red colour, second type is of gold colour and the third type is of black colour. The first, second and third socks that he picks, may be of three different colours but the the fourth one will definitely match with one of the socks that he has already picked up.
So, he has to pick up atleast 4 socks before getting the matching pair.
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