C. 20 / 20
ExplanationStep 1: nPr is used for arrangements. Step 2: 5P2 = 5×4 = 20. Step 3: Use permutation when order is important.
Step 1: nPr arrangement के लिए use होता है। Step 2: 5P2 = 5×4 = 20। Step 3: Order important हो तो permutation लगाएं।
Tap once to confirm. On the next tap, login will open for the answer.
Tap once to confirm. On the next tap, login will open for the answer.
Tap once to confirm. On the next tap, login will open for the answer.
Tap once to confirm. On the next tap, login will open for the answer.
Tap once to confirm. On the next tap, login will open for the answer.
Tap once to confirm. On the next tap, login will open for the answer.
Use Google login or mobile OTP. Admin can block users and control login providers.
Quiz questions, daily challenge and practice pages will open according to your selected class.