Answer:
65
Step-by-step explanation:
There are 110 students in total
15 of them drink nothing so we have 95 students who drink either tea or coffee or both drinks
70 drink tea
30 drink cofee
70+30 = 100 but we have 95 students so 5 students actually drink both drinks
therefore to find how many drank tea only we subtract the amount who wrank both drinks,70-5 = 65
