hadiah
hadiah
09-05-2017
Mathematics
contestada
can someone help me with this topic
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tonb
tonb
09-05-2017
You can take the mean of each category (assuming it is evenly distributed) and calculate the mean as (10x4 + 30x3 + 50x2 + 70x1) / (4+3+2+1) = 300/10 = 30
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