Question
Construct the frequency distribution table from the following cumulative frequency table:
$(i) $State the number of students in the age group $10 - 13.(ii)$ State the age$-$group which has the least number of students.
| Ages | No. of students |
| Below $4$ | $0$ |
| Below $7$ | $85$ |
| Below $10$ | $140$ |
| Below $13$ | $243$ |
| Below $16$ | $300$ |

