1.In a group, 25 person like tea or coffee, of these 15 like tea and 6 like both coffee and tea. How many like coffee?

a. 14

b.15

c.16

d.17

2.In a survey of 40 student in class, 10 were fond of having pineapple juice, 15 were fond of orange juice and 7 like to have bot pineapples as well as orange juice. Find how many students were taking neither pineapple juice nor orange juice.

a. 22

b.25

c.32

d.35

3.In a survey. Sam found that 38 people liked product A. 36 people liked product B, and 39 people liked product C. if 24 people like both product A and B, 20 people liked products C and A, 18 people liked products B and C, and 9 liked all the three products. Find how many like product C only

a. 40

b.30

c.20

d10

4.In a group of 60 students, 25 play tennis, 16 do swimming, and 22 play cricket, 8 play table tennis and do swimming, 6 play cricket and do swimming, 5 play table tennis, and cricket, and 12 students do not play any of these game. How many play table tennis, do swimming, and play cricket?

a.3

b.4

c.5

d.6

5.which properties is not needed to test if a set is a group or not?

a. Commutative property

b. Inverse property

c. Identity property

d. Closure property