Odds Quiz
4 questions · easy to harder · Probability · score and step-by-step answers
How it works
- 4 questions, about 12 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 2 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. A calculator is on the screen.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
The odds for A are 3 : 5, find P(A)- A) P(a) = 35
- B) P(a) = 8
- C) P(a) = 3
- D) P(a) = 38
2 Question 2
The odds against rain are 7 : 2, find P(rain)Type the answer.
3 Question 3
The odds for win are 4 : 6, find P(win)- A) P(win) = 4
- B) P(win) = 25
- C) P(win) = 10
- D) P(win) = 23
4 Question 4
The odds against win are 15 : 5, find P(win)Type the answer.