The mean of the following data is 16. Find the missing frequencies a and b, if
the total of the frequencies is 70.
Class 0-5 5-10 10-15 15-20 20-25 25-30 30-35 35-40
Frequency 12 a 12 15 b 6 6 4
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The median of the following data is 16. Find the missing frequencies a and b if the total frequencies is 70.
Class Frequency
0-5 12
5-10 a
10-15 12
15-20 15
20-25 b
25-30 6
30-35 6
35-40 4
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