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Quiz

Grade 7: Data and probability

10 questions with solutions for grade 7: surveys, bar and pie charts, line graphs and pictograms, modal class, mean, experimental and theoretical probability.

Type the number or choose the right answer. When you finish, click Check answers and see the solutions.

1. How many degrees is the sector for 1/4 of the data in a pie chart?

2. Of 36 pupils, 12 like drawing. How many degrees is that sector?

3. The mean of 4, 7, 8, 9?

4. Two classes of 25 pupils have means of 7 and 9 points. What is the combined mean?

5. Groups: 0–10 (3), 10–20 (8), 20–30 (5). Which is the modal class?

6. In a pictogram one symbol is 5 pupils. How many pupils are 4 symbols?

7. The probability of a 3 on a normal dice?

8. The probability of a number greater than 4 on a dice?

9. A coin is tossed 50 times and lands heads 27 times. What is the experimental probability of heads?

10. A box has 2 red, 3 blue and 5 green balls. The probability of green?