FoundationNumeric answer
Calls arrive at an average of 3 per minute. What is the probability of no calls in a given minute? Give a decimal.
Answer with a number. Fractions, powers and expressions like 23/6 or C(52,5) are read correctly in practice.
The worked solution is in Premium
The answer, the full working and the one idea to take away – for this and all 1,322 questions in the bank. Answer it in practice and your working is marked, with a known mistake named when you make one.
Learn the method
More probability questions
- X and Y are independent standard normals. What is Pr(Y > 3X)? Give a decimal.Foundation
- In Texas Hold'em you are dealt two cards from a standard deck.Foundation
- A trade idea works independently with probability 0.25 each time it is tried.Foundation
- You have rolled a fair die twelve times without seeing a six.Applied
- One name has daily volatility 1% and another 3%, both with mean return zero.Applied
- How many people are needed before the probability that two share a birthday…Applied