ACT: Mean from totals Quiz
10 questions · easy to harder · ACT Math · score and step-by-step answers
How it works
- 10 questions, about 20 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 5 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
Lena's test scores are 80, 85 and 90. What score on the next test makes her mean 87?- A) 93
- B) 255
- C) 348
2 Question 2
Mia's quiz scores are 90, 84 and 88. What score on the next quiz makes her mean 89?Type the answer.
3 Question 3
The mean of 5 numbers is 12. Four of them are 10, 8, 15 and 11. What is the fifth number?- A) 44
- B) 60
- C) 16
4 Question 4
The mean of 3 numbers is 15. Two of them are 11 and 19. What is the third number?Type the answer.
5 Question 5
Ben's game points are 60, 74, 68 and 70. What number of points in the next game makes his mean 70?- A) 78
- B) 272
- C) 350
6 Question 6
The mean of 3 test scores is 75. For a mean of 78, what score is needed on the next test?Type the answer.
7 Question 7
The mean of 3 test scores is 90. What score on the next test makes the mean 88?- A) 352
- B) 82
- C) 270
8 Question 8
The mean of 5 numbers is 30. Four of them are 28, 35, 22 and 31. What is the fifth number?Type the answer.
9 Question 9
A team of 12 players has a mean height of 75 inches. Another team of 18 players has a mean height of 85 inches. What is the mean height of all 30 players?- A) mean = 80
- B) mean = 81
- C) mean = 30
- D) mean = 900
10 Question 10
A class of 40 students has a mean score of 62. A class of 10 students has a mean score of 72. What is the mean score of all 50 students?Type the answer.