Question

In the following cumulative frequency table, find the values of a, b, c and d.

Determine median of the following frequency distribution : | Class | Frequency | |-------|----------| | 15 – 20 | 8 | | 20 – 25 | 13 | | 25 – 30 | 21 | | 30 – 35 | 12 | | 35 – 40 | 5 | | 40 – 45 | 4 |

Read the text carefully and answer the questions: To promote financial literacy among students, a mathematics teacher decided to conduct a session on budgeting and saving. To make the session practical and relatable, the teacher first conducted a survey to understand the spending habits of the students by collecting data on their monthly pocket money. The data on the monthly pocket money of 100 students of a class was compiled and is presented in the following frequency distribution table.

The times, in seconds, taken by 150 atheletes to run a 110 m hurdle race are tabulated below: | Class | 13.8-14 | 14-14.2 | 14.2-14.4 | 14.4-14.6 | 14.6-14.8 | 14.8-15 | |-------|---------|---------|-----------|-----------|-----------|----------| | Frequency | 2 | 4 | 5 | 71 | 48 | 20 | The number of atheletes who completed the race in less then 14.6 seconds is: