Question

- 72% of the students of a certain class took
Biology and 44% took Mathematics. If each
student took Biology or Mathematics and 40
took both, the total number of students in the
class was​

Answer 1

Answer:

156/

Step-by-step explanation:

I hope this is help for you

Answer 2

Biology = 72%

Mathematics = 44%

% That took both is:- [ 72 + 44 ] - 100 = 16

16% of total class books. both math biology.

$\frac{16}{100} \times x = 40$

$x = \frac{40 = 10 \times 100 = 25}{16(cut)4(cut)}$

= X = 250 { Answer }

Description:-

Please cheak the attached image.

Image contain clear Solution then writen text.

Because some numbers are cutted and how? [ You can understand better in Image. ]