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Three friends Ade, Ben and Cade have 9 marbles in front of them. Their weights are as follows:
154, 16, 19, 101, 10, 17, 13, 46 and 22 grams.

Each of the three friends takes 3 marbles. Ade's bunch weighs precisely twice as much as Bill's bunch.

What is the total weight in Cade's bunch?

(No Solution Yet, 3 Comments) Submitted on 2014-09-20 by K Sengupta   
Difficulty: 3 of 5 Bonus: Coin tossing (in Probability) Rating: 3.67
I threw a coin n times, and never got three tails in a row. I calculated the odds of this event, and found out they were just about even; 50%-50%. How many times did I throw the coin?

A second question: what were the chances of having not gotten three heads in a row either?

(Solution Posted, 25 Comments) Submitted on 2004-06-11 by Federico Kereki   
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Recently Posted Solutions:
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