Boys are allowed to watch football at C. V. Raman auditorium subjected to conditions.

i) The boy over age 16 can wear overcoat
ii) No boy over age 15 can wear cap
iii) To watch the football either he has to wear overcoat or cap or both
iv) A boy with an umbrella or above 16 or both cannot wear sweater.
v)  Boys must either not watch football or wear sweater.
What is the appearance of the boy who is watching football?

solution:
let's make pie diagram :

As statement  iii) say To watch the football either he has to wear overcoat or cap or both
Therefore boys over age 15 get eliminated.

As statement  v) say Boys must either not watch football or wear sweater.
Therefore  boys over age 16 get eliminated.

As question says appearance of the boy who is watching football?
means boy should watch Football

Hence
Boy should be below 15
No Overcoat
Cap -Yes
Sweater-yes and Umbrella – No ( Because (iv) A boy with an umbrella or above 16 or both cannot wear sweater and (v) Boys must either not watch football or wear sweater. )

solution: 

Boys must be below 15 and they should wear cap and sweater.