Aptitude - Rita puts 9 pairs of black socks and 8 pairs of white socks in a drawer. She takes 3 socks. What is

GeekInterview.com > Placement Papers > Oracle > Aptitude

Go To First | Previous Question | Next Question

Aptitude | Question 4 of 40

Rita puts 9 pairs of black socks and 8 pairs of white socks in a drawer. She takes 3 socks. What is the probability that we get a pair of black socks?

Total Answers and Comments: 9

Last Update: September 26, 2007

Sponsored Links

Best Rated Answer

—

Submitted by: suman

we can get a pair of black socks in two ways3 black socks or 2 black and 1 white socksso probability is(18C3+18C2*16C1)/34C3

Above answer was rated as good by the following members:
soundharyaa

September 09, 2005 04:05:30

RE: Rita puts 9 pairs of black socks and 8 pairs of white socks in a drawer. She takes 3 socks. What is ...

9C3

Is this answer useful? Yes | No

0 1

Overall Rating: -1

January 25, 2006 13:39:43

arnab kr

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

among 3 socks she has to choose 2 black socks from 9 pair( 18) of black socks that can be done in 18C2 ways. and the third sock can be chosen from among the remaining socks that can be done in ((8+9-1)x2 )C 1 ways i.e. in 32 ways.

ans. 32 X 18C2

Is this answer useful? Yes | No

June 19, 2006 09:38:43

shweta narayan

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

i am interested in these materials ..kindly help

Is this answer useful? Yes | No

June 30, 2006 13:49:44

Partha006

Member Since: June 2006 Contribution: 6

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

Rita puts 9 pairs of black socks and 8 pairs of white socks in a drawer. She takes 3 socks. What is the probability that we get a pair of black socks?

The probablity is 9c2/17c3

Is this answer useful? Yes | No

November 10, 2006 14:06:34

sri

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

its 32C1/34C3

Is this answer useful? Yes | No

November 12, 2006 11:19:52

purushotham

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

answer 18c2*16c1 / 34c3

Is this answer useful? Yes | No

November 13, 2006 00:47:15

suman

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

we can get a pair of black socks in two ways3 black socks or 2 black and 1 white socksso probability is(18C3+18C2*16C1)/34C3

Is this answer useful? Yes | No

1 0

Overall Rating: +1

November 28, 2006 05:28:50

prathyusha

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

its (18C2 * 32C1)/34c3

Is this answer useful? Yes | No

September 26, 2007 10:29:13

Balu Vasudevan Pillai

RE: Rita puts 9 pairs of black socks and 8 pairs of wh...

Answer should be 9C1/17C1 that is probability to draw a pair.

Any contradictions?

Is this answer useful? Yes | No

Go To Top

User Name		Remember Me?
Password

Question Bank