There are 20 girls and 15 boys in a class.
(a)What is the ratio of number of girls to the number of boys?
(b)What is the ratio of girls to the total number of students in the class?
In figure, P is a point in the interior of a parallelogram ABCD.
(i) ar (APB) + ar (PCD) =ar (ABCD)
(ii) ar (APD) + ar (PBC) = ar (APB) + ar (PCD)
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