1.The marks scored by 20 students in a test are given below: 84, 57, 53, 89, 41, 57, 47, 64, 58, 44, 53, 72, 51, 78, 71, 62, 56, 68, 54, 42 Complete the following frequency table: (i) What is the upper limit of 40–50? (ii) What is the upper limit of 70–80? (iii) What is the class size?
(Solve with formula please)
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(i) 42,44,47,41
(ii) 71,72,78
(iii) 20 students
= In a class whenever it is a test all students perform in it , so there are 20 students
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