engineering recuitment NIC NIELIT Scientist B 2023 Mock Test Quantitative Aptitude Permutation and Combination
Eight athletes go running for seven days starting from a Sunday to Saturday. Each day only two athletes go for running and no pair is repeated on any of the days. In how many ways is it possible to have this scenario?
1
28! × 7!/21!
2
28!/21! × 7!
3
28!/21!
4
None of the above