Foundation June 2022 Paper 2 Q15
15 The table shows information about the number of social media accounts used by each of 300 students.
| Number of social media accounts | Frequency |
|---|---|
| 0 | 3 |
| 1 | 57 |
| 2 | 84 |
| 3 | 75 |
| 4 | 81 |
(a) Work out the total number of social media accounts used by these students. (2)
(b) Find the median number of social media accounts used by these students. (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| 774 | M1 | for at least three of \(0 \times 3\ (= 0)\) or \(1 \times 57\ (= 57)\) or \(2 \times 84\ (= 168)\) or \(3 \times 75\ (= 225)\) or \(4 \times 81\ (= 324)\) or for \(0 \times 3 + 1 \times 57 + 2 \times 84 + 3 \times 75 + 4 \times 81\) |
| A1 | cao |
Additional guidance
Note if 2 non zero products are seen award M1
Use of the figure 777 is enough for M1
| Answer | Mark | Mark scheme |
|---|---|---|
| 3 | M1 | for method to begin to work with the median, eg \(300 \div 2\ (= 150)\) |
| A1 | cao |
Additional guidance
Accept 301 in place of 300
NB mean = 2.58