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A man wears socks of two colours - Black and brown. He has altogether 20 black socks and 20 brown socks in a drawer. Supposing he has to take out the socks in the dark, how many must he take out to be sure that he has a matching pair ?
A. 3
B. 20
C. 39
D. None of these
Read Solution (Total 6)
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- 3 socks must be taken out to be sure that he has a matching pair .
- 12 years agoHelpfull: Yes(4) No(2)
- there are 2 coloured socks
which is black and brown
let suppose 3 is choosen at random
then three conditions arises
1. all are black
2.all are brown
3. either it will have 2 black and 1 brown or it will hav 2 brown and 1 black
so in all the conditions as above mentioned we are getting atleast one pair of socks
- 9 years agoHelpfull: Yes(3) No(0)
- ya It is 3.
- 10 years agoHelpfull: Yes(1) No(0)
- Hello Pargat, Please explain this problem step by step. Thank you.
- 10 years agoHelpfull: Yes(0) No(0)
- I think the answer should be 21.
- 10 years agoHelpfull: Yes(0) No(1)
- It is 3
Cause. ..
1.all can be black
2.all can be brown
3.2 can be black
4.2 can be brown - 7 years agoHelpfull: Yes(0) No(0)
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