Question

The 90 members of a sport club play at least one of the games, tennis, football, and volley ball. 10 plays tennis, football and volleyball. 10 plays tennis and football, 19 play football and volleyball and 29 play tennis and volleyball. n people play all three games. 2n people each play only one game how many play football altogether

Answer 1

I can't make sense out of the data
you say: 10 plays tennis, football and volleyball, so I put 10 in the
intersection of the 3 sports in my Venn diagram
Then it says " n people play all three games"
So is n = 10 ???

explain

Answer 2

49 people play football altogether.