प्रकाश परावर्तन तथा अपवर्तन - L19 | अपवर्तनांक| Class 10 NCERT विज्ञान | 7 AM | Ruchi Mam

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.

The marks obtained (out of 20) by 30 students of a class in a test are as follows: 14, 16, 15, 11, 15, 14, 13, 16, 8, 10, 7, 11, 18, 15, 14, 19, 20, 7, 10, 13, 12, 14, 15, 13, 16, 17, 14, 11, 10, 20. Prepare a frequency distribution table for the above data using class intervals of equal width in which one class interval is 4-8 (excluding 8 and including 4).

Find the mode for the following data. {:("Class Interval",f),(" "0-9,2),(" "10-19,4),(" "20-29,7),(" "30-39,5),(" "40-49,3):}