Combinations Quiz
10 questions · easy to harder · Probability · score and step-by-step answers
How it works
- 10 questions, about 30 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 4 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
Calculate 5C2- A) 2
- B) 10
- C) 5
- D) 20
2 Question 2
Calculate 4C2Type the answer.
3 Question 3
Calculate 6 choose 2- A) 2
- B) 15
- C) 6
- D) 30
4 Question 4
Calculate 8C3Type the answer.
5 Question 5
Calculate 9C2- A) 72
- B) 9
- C) 36
- D) 2
6 Question 6
A coach picks 3 of 8 players for a team. How many different teams are there?Type the answer.
7 Question 7
6 friends meet. Each pair shakes hands once. How many handshakes are there?Type the answer.
8 Question 8
Calculate 10C3Type the answer.
9 Question 9
Calculate 10C4- A) 210
- B) 4
- C) 5040
- D) 10
10 Question 10
Maya picks 3 of her 7 books for a trip. How many ways can she pick?Type the answer.