Question 59

Which of the following is the arithmetic mean of $$ 2X^{2}-10, 30-X^{2} and -X^{2}+6X+10 $$ ?

Solution

Mean = sum/3

= $$ (2X^{2}-10 + 30-X^{2} -X^{2}+6X+10) $$/3

= 2x + 10

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