Select the option that is related to the third number in the same wayas the second numberis related to the first number.
3 : 20 ::Â 7 :Â ?
In 3 : 20,
$$(3)^2 \times 2 +Â 2 = 18 +Â 2 = 20$$
Similarly,
$$(7)^2 \times 2 + 2 = 98 + 2 = 100$$
$$\therefore$$ The correct answer is option C.
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