maths puzzles - No 3

Index
maths puzzles - No 3
maths puzzles - No 3

venkaram92 > 05-08-2012, 05:40 PM

MATHS PUZZLES GAMES
1.YOU CAN THREE BAGS ,EACH CONTAINING TWO MARBLES,A BAG HAS TWO WHITE MARBLES, B BAG HAS TWO BLACK MARBLES ,C BAG HAS ONE WHITE AND BLACK MARBLES.YOU TAKE ONE RANDOM BAG ,TAKE IT OUT IT MUST WHITE MARBLES.WHAT IS PROVABILITY OF REMAINING MARBLES FROM SAME BAG
RE: maths puzzles - No 3

koushik > 11-01-2013, 07:03 PM

2/3 (not 1/2)
You know that you do not have Bag B ( two black marbles) so there are three possibilities
You chose Bag A , first white marble. The other marble will be white
You chose Bag A , second white marble. The other marble will be white
You chose Bag C , the white marble. The other marble will be black
So 2 out of 3 possibilities are white.
Why not 1/2? You are selecting marbles, not bags.
RE: maths puzzles - No 3

WR1334 > 11-01-2013, 07:07 PM

Bro..pls dont copy & paste!!!
Next Oldest Next Newest