Each section in the first year of plus two courses has exactly 40 students If there are 5 sections i...........

Quantitative Aptitude ( CCS) Permutation & Combination

Each section in the first year of plus two courses has exactly 40 students. If there are 5 sections, in how many ways can a set of 4 student representatives be selected, one from each section?

2560000

246500

2240000

2360000

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Explanation:

We can choose 1 student from 40 students in 4°C1 ways.
So a set of 4 students can be chosen in = 4°C1×4°C1×4°C1×4°C1 ways
4°C1 = 40!/(1!×39!) = 40
So total number of ways = 40×40×40×40 = 2560000