Study the following diagram: .
The number of non-chess players is how much more than the players who play both chess and tennis.
SubQuestion No: 2
The number of tennis players who are not hockey players is
SubQuestion No: 3
The ratio of hockey players to chess players is
\( \frac{9}{18} \)
\( \frac{10}{18} \)
\( \frac{11}{18} \)
\( \frac{15}{18} \)
If the mathematical operator ‘+’ means ‘÷’, ‘−’ means ‘+’, ‘÷’ means ‘×’ and ‘×’ means ‘−’, then the value of 17 − 7 ÷ 27 + 3 × 79 is