The median and the mode of the following distribution are 33.5

The median and the mode of the following distribution are 33.5 and 34 find the missing frequencies if the sum of frequencies is 230

Marks. 0-10 10-20 20-30 30-40 40-50 50-60 60-70

Frequency 4. 16. X. Y. Z. 6. 4

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