Pls answer fast
Q7. Draw a histogram and frequency polygon for the following data :
C.I | 0-50 | 50-100 | 100-150 | 150-200 | 200-250 | 250-300 |
Frequency | 12 | 18 | 27 | 20 | 17 | 6 |
(i) Which mathematical concept is used in the above problem ?
(ii) What is its value ?