Question

In a class test marks obtained by 120 students are given in the following frequency distribution. If it is given that mean is 59 then find the frequencies x and y.
Marks: 0-10, 10-20, 20-8 70-80, 80-90, 90-100
Frequency: 1, 3, 7, 10, 15, x, 9, 27, 18, y​

please explain!

Answer 1

Answer:

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