If mean of the following data are given as 28.5. find the missing frequency. class interval- 0-10, 10-20, 20-30, 30-40, 40-50 frequency- 7, x, 15, 8, 10
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Answer:
102.5
Step-by-step explanation:
(7+x+15+8+10)/5=28.5
40+x=28.5*5
40+x=142.5
x=102.5
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