A student was asked to find the arthmetic mean of numbers 3,11,7,9,15,13,8,19,17,22,14 and x .He found the mean be 12 . What should be the number in place of x ?
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Answer:
X=7
Step-by-step explanation:
Given, mean =12
12= 3+11+7+9+15+13+8+19+17+21+14+x/12
12= 137+x/12
144=137+x
x=144−137=7
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