Question

Of the 10 students will be formed 5 groups, respectively membered 2. how many ways to form five groups?

Answer 1

Have you studied the multinomial coefficients?

Answer 2

45 \[10 C 2 , C : is combination = 10!\div(2! \times 8!)\]

Answer 3

amressam! y did you give away the answer?
explain first please!!!