1.

Sathvik has 12 black socks and 12 Design socks in his Shelf. In Complete darkness, how many socks must he take from the those to get a matching pair.​

Answer»

How many SOCKS must Sathvik take?

Given :-

No. of black socks by Sathvik = 12

No. of designer socks by Sathvik = 12

Solution :-

  1. Sathvik PICKED up a sock.
  2. He picked up a second sock. Now there are two possibilities :- Either it will match with the first sock or it will not match with the first sock.
  3. He picked up a third sock. Now the possibilities are :- It will either match with the first sock he chose or it will match with the second sock he chose.
  4. Hence, he will get a pair either way.

Let US have a look at the POSSIBLE combinations to understand it clearly :-

  • (B,B,B) ; (B,B,D) ; (B,D,D) ; (D,D,D) ; (D,D,B) ; (D,B,B)

Here :-

D = Designer Socks

B = Black Socks

The order represents the three socks chosen.

Sathvik must take three socks in order to get a MATCHING pair for sure.



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