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In how many ways can (4) different pictures be placed on a wall from left to right?

Answer and explanation

Correct answer: 24

The four pictures are distinct and are arranged in a left-to-right row, so order matters. Hence, the number of arrangements is \(4! = 4 \times 3 \times 2 \times 1 = 24\). A value such as \(16\) is not the correct permutation count. Exam tip: for arranging \(n\) distinct objects in a row, use \(n!\).

Related tags

PermutationsArrangementsFactorialClass 11MathematicsPermutations And CombinationsClass 11 Mcq

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