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Question

Second number is average of other two number

$\frac{9+21}{2}=\frac{30}{2}=15$

Similarly

$\frac{4+12}{2}=\frac{16}{2}=8$

Vedclass · Accepted Answer

$(4,8,12)$

Vedclass · Answer

Second number is average of other two number

$\frac{9+21}{2}=\frac{30}{2}=15$

Similarly

$\frac{4+12}{2}=\frac{16}{2}=8$

Choose the correct alternative for the given relation.

Given set : $(9,15,21)$