PLZ SOLVE THIS SIMPLE ELEMENTARY SET THEORY PROBLEM

[goodwillquantized]

Q : In a group of 50 persons,14 drink tea but not coffee and 30 drink tea. Find:
(i) how many drink tea and coffee both;
(ii) how many drink coffee but not tea.

 

i think the answer to (i) is n(T intersection C) = 30 -14 = 16

 

what is the answer to (ii) ?

 

i cannot solve the question - either

(a) i'm an idiot! or

(b) i don't understand the question [ i don't know whether (b) necessarily imply (a) even when English is not my mother tongue]

© ( this option is avoided for obvious reasons! )

 

so somebody plzzzzzzzzzzz help!!!!!!!!!!!!!!!!!!!!!1

 

 

[imatfaal]

I think you need to make an assumption about the total number of people and that they all drink either coffee or tea or both