1050 students take any of the following subjects as their specialization -…
2025
1050 students take any of the following subjects as their specialization - Physics, Chemistry and Biology. If the number of students opting for Biology is 1.5 times the number of students opting for Physics and Chemistry each, then how many students opt for Chemistry ?
- A.
250
- B.
300
- C.
350
- D.
450
Attempted by 1673 students.
Show answer & explanation
Correct answer: B
Solution: Use algebra to set up the totals.
Let Physics = x. Since Biology is 1.5 times Physics and also 1.5 times Chemistry, Physics = Chemistry = x and Biology = 1.5x.
Total students = x + x + 1.5x = 3.5x, and this equals 1050.
Solve 3.5x = 1050 ⇒ x = 1050 ÷ 3.5 = 300. Therefore Chemistry = 300.