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Class 11MathematicsPermutations and CombinationsPermutationsEasy
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How many ordered pairs can be formed by taking (2) letters from (P,Q,R,S,T)?

Answer and explanation

Correct answer: (20)

For (2) ordered positions from (5) letters, ({}^{5}P_{2}=20). In ordered pairs, ((P,Q)) and ((Q,P)) are different.

Related tags

PermutationsClass11EasyPermutations And CombinationsMathematicsClass 11 Mcq
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