DS 14,22

When tossed, a certain coin has equal probability of landing on either side. If the coin is tossed 3 times, what is the probability that it will land on the same side each time?A.1/8

B. 1/4

C. 1/3

D. 3/8

E. 1/2

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GHCV tagged this post with: GMAT Data Sufficiency, GMAT Question of the Day Read 54 articles by GHCV

1. ps says:

   October 18, 2007 at 3:18 am

   total number of events = 2^3=8
   favorable case :- hhh or ttt

   hence 2/8= 1/4
   hence b
2. mani kant says:

   October 18, 2007 at 12:17 pm

   Sample space is TTT,THT,TTH,HTT,HTH,TTT,HHH,HHT.

   The reqm. is TTT & HHH.

   Thus, probability is 2/8=1/4.
3. vikas gupta says:

   October 18, 2007 at 10:27 pm

   B
4. Ankur Chawla says:

   October 19, 2007 at 4:13 am

   Ans is B

   Total possibilities : 2x2x2 = 8

   Coin falling on same side : HHH and TTT, 2 poss.

   Hence 2/8 = 1/4
5. Thiago says:

   October 25, 2007 at 5:11 pm

   B !
6. Tapas says:

   October 23, 2008 at 3:18 pm

   I will go for B

   (HHH, TTT) out of 8 possibilities so 2/8 = 1/4
7. Binita says:

   October 18, 2009 at 1:16 am

   B
8. deepak says:

   October 18, 2009 at 3:44 pm

   I will go with option B
9. Brittany says:

   October 19, 2009 at 7:19 am

   B – 1/4

   1st toss will be 100% or 1/1
   2nd toss will be 50% or 1/2
   3rd toss will be 50% or 1/2

   1/1 * 1/2 * 1/2 = 1/4.
10. Rupak says:

    October 19, 2009 at 6:48 pm

    B