Question : The following bar diagram shows the number of students who opted for different subjects in the year 2020 and 2021.
Out of all 5 subjects, what percentage (rounded up to two decimal places) of students opted for Biology in 2021?
Option 1: 23.14%
Option 2: 22.34%
Option 3: 21.18%
Option 4: 24.31%
Correct Answer: 21.18%
Solution :
Number of students who opted for biology in 2021 = 90
Number of students opting for other subjects in 2021 = 85 + 65 + 110 + 75 = 335
Total number of students = 335 + 90 = 425
$\therefore$ Percentage of students opting for biology = $\frac{90}{425}\times100$ = 21.18%
Hence, the correct answer is 21.18%.
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