Question

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

Answer 1

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.

Answer 2

Answer:

1-60

2-both students 130 maths 80 science 60

130+80+60=270