Goldman Sachs DeckHard

Brainteaser: roll two fair dice — what's the probability the sum is 7, and why is 7 the most likely sum?

Model answer

Define the sample space out loud: 6 x 6 = 36 equally likely outcomes. Seven can be made six ways — (1,6), (2,5), (3,4), (4,3), (5,2), (6,1) — so the probability is 6/36 = 1/6. Seven is the most…

The full, human-reviewed answer is in the bank.

Sign up free and Daily 10 serves you 10 questions a day from all 1,500+ — or go Pro for unlimited reps.

More from Goldman Sachs Deck

Browse all topics