क्रमचय और संचय
Combination and Permutation
Combination and Permutation
Question 26 of 36
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Question 26
nPr = 720 और nCr = 120 है, तो r का मान क्या होगा?
Explanation
nPr = nCr × r! => 720 = 120 × r! => r! = 6 => r = 3।