A club has members of whom can play football, can play tennis, and can play cricket. Moreover, members can play both football and tennis, can play both cricket and tennis, while can play both football and cricket. If every member can play at least one game, then the number of members who can play only tennis is
A club has members of whom can play football, can play tennis, and can play cricket. Moreover, members can play both football and tennis, can play both cricket and tennis, while can play both football and cricket. If every member can play at least one game, then the number of members who can play only tennis is
Solution
We need to organize the information about club members and their sport preferences using a systematic approach. Let us solve this using a Venn diagram method with three overlapping circles.
We have 256 total members where:
-
144 play football
-
123 play tennis
-
132 play cricket
-
58 play both football and tennis
-
25 play both cricket and tennis
-
63 play both football and cricket
-
Everyone plays at least one game
Let us define = number of members who can play all three games.
Using the intersection information:
-
Members playing football and tennis (including those who play all three): 58
-
Members playing cricket and tennis (including those who play all three): 25
-
Members playing football and cricket (including those who play all three): 63
Key Insight: When we say "58 can play both football and tennis," this includes those who play all three games.
So:
-
Only football and tennis (not cricket) =
-
Only cricket and tennis (not football) =
-
Only football and cricket (not tennis) =
For only tennis:
Total tennis players = Only tennis + (Football & Tennis only) + (Cricket & Tennis only) + (All three)
Only tennis =
Similarly:
-
Only football =
-
Only cricket =
Total members = Only football + Only tennis + Only cricket + (F&T only) + (C&T only) + (F&C only) + All three
Members who can play only tennis =
Important Note: This method ensures we don't double-count anyone and systematically accounts for all possible combinations of sports preferences.
Related questions:
CAT 2018 Slot 2
CAT 2018 Slot 1
CAT 2018 Slot 2