The mean of a set of 10 number is 60. When a number x is added to the set the mean is changed to 65
1 answer:
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Answer:
b=i* or -i*
Step-by-step explanation:
11b^2-9=-68
11b^2=-59
b^2=-59/11
b=i* or -i*
"i" in this case is an imaginary number, equal to
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