Question

In a class of 50 student,18 offered mathematics, 21 offered chemistry while 16 offered biology, 7 student offered mathematics and biology, 9 student offered chemistry and biology while 5 student offered the three subjects. find the number that offered mathematics but neither chemistry nor biology.

b the number of students that offered biology but neither chemistry nor mathematics and the number that offer biology neither mathematics nor chemistry​

Answer 1

ill try:

18 - 7 = 11

11 - 5 = 6

6 offered math but neither chem nor bio.

16 - 7 = 9

9 - 9 = 0

0 - 5 = -5

so 0 offered bio but neither chem nor math.