Question

In an exam, 80 students passed in Maths, 70 failed in Maths, 90 failed in Science and 20 failed in both, (1) (How many students were passed in Science ? How many students were passed in both Maths and Science?​

Answer 1

Answer:

130 students passed in science.210 students passed in both maths and science.

Answer 2

Answer:

70 students failed in Math and 80 students passed in Math.

Total students = 70 + 80 = 150 students.

90 students failed in Science, so 150 — 90 = 60 students passed in Science.

With 20 students failing in Math and Science, and 70 students failed in Math, then 70 — 20 = 50 students failed in Math, but passed in Science.

Since, 60 students passed in Science, then 60 — 50 = 10 students passed in Science and passed in Math.

Finally, with 80 students passing in Math, then 80 — 10 = 70 students passing in Math, but failed in Science.

Answer: 10 students passed in both Math and Science, and 60 students passed in Science