Question

All students attend the competition and the winners are all members of the same class.

• A. 28*6!
• B. 26*6!
• C. 29*6!
• D. 31*6!
• E. 39*6!

Answer 1

The correct option is C

29*6!

The number of orders in which all the students attend the competition and students attend the competition and the winners are all members of the same class = (${}^6{C}_{6+}$${}^8{C}_6$) $\times$6!