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Class 11MathematicsPermutations and CombinationsCombinationsExpert
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How many rectangles are there in a grid of small squares with (5) rows and (6) columns?

Answer and explanation

Correct answer: (315)

For a rectangle, choose (2) horizontal lines from (6) and (2) vertical lines from (7). The count is (^{6}C_{2}\times{}^{7}C_{2}=315).

Related tags

RectanglesGridCombinationsPermutations And CombinationsMathematicsClass 11 Mcq
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