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Home/Practice questions/General Aptitude Test

General Aptitude TestQuantitative ReasoningPermutation & Combination

What is the value of ^81P_2-^81C_2?

What is the value of ${^{81}P}_2-{^{81}C}_2$?

Answer & explanation+

Correct answer: option 2

${^{81}P}_2-{^{81}C}_2$ = 6480 - 3240 = 3240

The correct answer is Option (2) → 3240

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