Question

each section of class in a college has exactly 40 students . if there are 4 students, in how many ways can a set of 4 student representative be selected, one from each section? ​

Answer 1

Answer:

Step-by-step 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