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7!/2! = 21  6!/2! = 15  how that ?
Asked by harshpunia109 | 26 Jun, 2023, 19:21: PM
answered-by-expert Expert Answer
It must be 7C2 and 6C2
7C2 = 7!/5!2! = 7x6/2 = 7x3 = 21
6C2 = 6!/4!2! = 6x5/2 = 3x5 = 15
Answered by Renu Varma | 27 Jun, 2023, 09:35: AM
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