Statistics and Probability

Alberta strand: Statistics and Probability. Covers circle graphs and probability of independent events.

9 questions, free, marked as you go with a worked explanation on every one.

What this covers

• probability and percent
• graph reading
• probability basics

The questions

1. A class of 30 students voted for a field trip: 15 chose the zoo. What percent chose the zoo?
2. A circle graph (pie chart) is most useful for showing:
3. A coin is flipped and a die is rolled. These two events are:
4. A bag has 4 green and 6 yellow candies. What is the probability (as a percent) of picking green?
5. A survey of 40 people found 24 prefer tea. What percent prefer tea?
6. Find the mean of: 6, 10, 8, 12, 14
7. Drawing a name from a hat, NOT replacing it, then drawing again. These events are:
8. A bag has 5 red and 15 blue marbles. What is the probability (as a percent) of picking red?
9. A bag holds 5 red, 3 blue and 4 green marbles. One marble is drawn and kept, then a second marble is drawn. What is the probability that both marbles are red? Give your answer as a percent, rounded to one decimal place.

Answer these free