First slide

Combinations

Question

The number of rectangles that can be found on a chess board is

Easy

A

_{$^{8} C_{2} \cdot^{8} C_{2}$}
B

_{$^{64} C_{4}$}
C

_{$^{9} C_{2} \cdot^{9} C_{2}$}
D

_{$^{8} C_{2}$}

Solution

The number of rectangles that can be found on a chess board is =_{$^{9} C_{2} \cdot^{9} C_{2}$}

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