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Answer

area of —
A : B : total
3 : 1 : 4
9 : 3 : 12

unshaded part of A : shaded part : unshaded part of B : total
7 : 2 : 1 : 10

(7 + 1)/10 = 4/5 of the whole figure is not shaded

Ans : 4/5 of the whole figure is not shaded.

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