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Answer:
median =21
x+2=21
x=21-2
x=19
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0
it's pretty simple........
median = sum of observation /
number of observations
21= 11+12+14+18+x+2+20+22+25+61 /
9
21 = 183+x+2/
9
21×9 = 183 + x + 2
189 - 184 - 2 = x
x = 3
hope it helps......
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