Questions / Quant trading, Counting & stopping
Draw without replacement
A bag has 4 green and 2 yellow tokens. Draw two without replacement. What is the probability both are green?
Answer it in the app It's free. You get hints, a second try if you miss, and a follow-up question.
Show the answer and worked solution
Answer: 40% (2/5)
- The probability is (4/6) × (3/5) = 0.4.
Interview shortcut. Sequential draws: 4/6 × 3/5.
In the app this has a follow-up where one thing about the setup changes. Try the follow-up.