Directions: The given cumulative frequency table shows the number of students in different grades |||||||| |---|---|---|---|---|---|---| | Number of students | 1 | 2 | 3 | 4 | 5 | 6 | | Frequency | 5 | 7 | A | 7 | B | 8 | | Cumulative frequency | 5 | 12 | 21 | 28 | 31 | 39 |
What is value of A?