median of number 11 12 14 18 x+2 20. 22 25 61 is 21 find the value of x
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Mean=11+12+14+18+x+2+20+22+25+61/9
Mean= 185+x/9
But mean =21
21=185 +x/9
21 x 9 =185 +x
189=185+x
189-185=x
4=x
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