1.

Given the following frequency distribution with some missing frequencies. Class 10-20 20-30 30-40 40-50 50-60 0-70 70-80 Frequency 185, a, 34, 180, 136 ,b ,50 respectively .If the total frequency is 685 and 42.6, find out the missing frequencies. a and b Options O 62,77O 32, 17 O 77, 23 O 23, 57​

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