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EXERCISE 21B (1) The marks obtained by 40 students of a class in an examination are given below:      8, 47, 22, 31, 17, 13, 38, 26, 3, 34, 29, 1… Read more »

EXERCISE 21A (1) The number of members in 20 families are given below: 4, 6, 5, 5, 4, 6, 3, 3, 5, 5, 3, 5, 4, 4, 6, 7, 3, 5, 5, 7 Prepare a frequency distrib… Read more »