Hard
Deduction Riddles
25 XP

The Envelope Swap

5,355 solved 59% solve rate 41% fail rate
You pick one of two envelopes. It contains $10. The other contains either $5 or $20 with equal probability. Should you switch?
Only 59% solve this correctly
5,355 attempts
Earn +25 XP for solving
Quick Answer & Explanation
Yes - the expected

The answer to this riddle is Yes - the expected. Difficulty: Hard · Solved by 5,355 puzzle lovers.

Yes - the expected value of switching is (5+20)/2 = $12.50, which is more than the $10 you have.
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