calculate the unknown figure when the mean is 68.25
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Answer:
missing frequency is 247.25....
Step-by-step explanation:
summation x = 433+x
summation f = 100
mean = summation x ÷ summation f
68.25 = 433 + x ÷ 100
68.25 × 100 = 433+x
680.25 = 433+x
680.25 - 433 = x
x = 247.25
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