Request you to please post your reasoning on the below question:
A math teacher has 30 cards, each of which is in the shape of a geometric figure. Half of the cards are rectangles, and a third of the cards are rhombuses. If 8 cards are squares, what is the maximum possible number of cards that re circles.
Squares are both rectangles and rhombuses. Circles are neither rectangles, nor rhombuses.
There are 15 rectangles and 10 rhombuses.
Using a Venn diagram or a 2 X 2 table, we can deduce that the maximum number of cards that re circles is 30 - (15 + 10 - 8) = 13.
PhD in Applied Mathematics
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