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(D) The logic behind the given set $(9, 15, 21)$ is that the second number is the arithmetic mean (average) of the first and the third number.Calculat

Vedclass · Accepted Answer

$(4, 8, 12)$

Vedclass · Answer

(D) The logic behind the given set $(9, 15, 21)$ is that the second number is the arithmetic mean (average) of the first and the third number.Calculation for the given set:$\frac{9 + 21}{2} = \frac{30}{2} = 15$Now,checking the options:For option $D$: $(4, 8, 12)$$\frac{4 + 12}{2} = \frac{16}{2} = 8$Since the logic holds true for option $D$,it is the correct alternative.

Choose the correct alternative for the given relation.
Given set: $(9, 15, 21)$

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Choose the correct alternative for the given relation.Given set: $(9, 15, 21)$