Question 6
The table shows the distribution of grades of candidates in an examination.
(a) Using a graph sheet, draw a bar chart for the distribution
(b) If all candidates who obtained grades above grade 3 were awarded credit, find the probability that a candidate selected at random obtained credit.
(c) Calculate, correct to the nearest whole number, the mean grade of the candidates.
| Grade | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Fraquency | 2 | 3 | 6 | 5 | 4 | 10 |
(a) Using a graph sheet, draw a bar chart for the distribution
(b) If all candidates who obtained grades above grade 3 were awarded credit, find the probability that a candidate selected at random obtained credit.
(c) Calculate, correct to the nearest whole number, the mean grade of the candidates.
Theory