HardMath and Logic
100B and 100W pearls. Maximize chance of picking Black.
Riddle
100B and 100W pearls. Maximize chance of picking Black.
Choose an answer
A.50/50 in each
B.100W in one, 100B in other
C.Alternating pearls
D.1B in Sack 1; rest in Sack 2
Hint: It's a 6-word phrase with 17 letters, starting with "1".
Answer
1B in Sack 1; rest in Sack 2
Why this is the answer
Putting 1 black pearl in Sack A gives a 100% chance if A is picked. Sack B then has 99B/100W (~50%). Total chance: 0.5(1) + 0.5(0.497) = 74.85%.
This riddle is filed under Expert Riddles for Adults and rated Hard.
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