Question

there are 210 members in a club, 100 of them drink tea and 65 drink tea but not coffee. find how many drink coffee?

Answer 1

do this and it should give u this answer  210-165=45

Answer 2

total members are 210

100 of them drink tea so 210-100=110

and 65 of them drink tea but not coffee i.e 110-65=45

so the members who do not drink coffee may be 45 members