Mystery Die

EasyBrainteasers

You have a fair $18-$ face die where each side can either be a $4$ or a $2$ . If the expected value of each die roll is $\frac{8}{3}$ , how many $2$ s are on the die?

Step-by-step hints are a Pro feature.Get started

Create a free account to answer and track your progress.

Practice like a quant

Create a free account to answer questions and track your progress — across 2,000+ interview questions.

Get started for free