Mathematics - Permutation & Combination Question with Solution | TestHub

MathematicsPermutation & CombinationnPr & nCrEasy2 minQB

MathematicsEasysingle choice

Number of rectangles excluding squares from a rectangle of size 7x 4

Answer:

Solution:

$(\frac{7 \times ( 7 + 1 )}{2} \times \frac{4 \times ( 4 + 1 )}{2}) - (4 \times 7 + 3 \times 6 + 2 \times 5 + 1 \times 4) = 220$

Stream:JEESubject:MathematicsTopic:Permutation & CombinationSubtopic:nPr & nCr

⏱ 2mℹ️ Source: QB

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