In a class tournament every student has to play a game with one another If 2 students fell ill - Maths - Permutations and Combinations

Question

In a class tournament every student has to play a game with one
another If 2 students fell ill after playing 3 games each, (they
never play with each other) and in total 84 games were played, then
the number of students in the class is:

(a) 15 (b) 10
​​
(c) 20 (d) None of these

Priyanka Kedia · Accepted Answer

Dear Student,

Refer the following link:

https://www meritnation
com/ask-answer/question/in-a-chess-tournament-every-participant-has-to-play-one-gam/permutations-and-combinations/1495814

In a class tournament every student has to play a game with one another. If 2 students fell ill after playing 3 games each, (they never play with each other) and in total 84 games were played, then the number of students in the class is: (a) 15 (b) 10 ​​ (c) 20 (d) None of these

In a class tournament every student has to play a game with one another. If 2 students fell ill after playing 3 games each, (they never play with each other) and in total 84 games were played, then the number of students in the class is:

(a) 15 (b) 10

(c) 20 (d) None of these