Answer:
number of students = 500
Step-by-step explanation:
Let total students be 100x
Math pass = 80% = [tex]\frac{80}{100} \times 100x = 80x[/tex]
Math fail = 100x - 80x = 20x
English pass = 75% = [tex]\frac{75}{100} \times 100x = 75x[/tex]
English fails = 100x - 75x = 25x
Failed in both subject = 5% = [tex]\frac{5}{100} \times 100x = 5x[/tex]
Total fail = Math fail + English fail - Both fail
= 20x + 25x - 5x
= 40x
Total pass = 100x - 40x = 60x
Given total number of students passed = 300
60x = 300
[tex]x = \frac{300}{60} = 5[/tex]
Therefore, total number of students = 100 x = 500 students
