Study the following pie chart that shows the percentage-wise distribution of teachers who teach six different subjects, and answer the question given below. Total number of teachers = 1600 If the number of teachers who teach Accountancy is increased by 25% and the number of teachers who teach Economics is decreased by 25%, then the total number of teachers who teach Accountancy and Economics together is:

Study the following pie chart that shows the percentage-wise distribution of teachers who teach six different subjects, and answer the question given below. Total number of teachers = 1600 If the number of teachers who teach Accountancy is increased by 25% and the number of teachers who teach Economics is decreased by 25%, then the total number of teachers who teach Accountancy and Economics together is: Correct Answer 352

Subjects Number of teachers
Mathematics 25% of 1600 = 400
Physics 18% of 1600 = 288
Chemistry 18% of 1600 = 288
Economics 16% of 1600 = 256
Accountancy 8% of 1600 = 128
Biology 15% of 1600 = 240

Number of Accountancy teacher increased by 25% = 128 + 25% of 128

⇒128 + 32

⇒160

Number of Economics teacher decreased by 25% = 256 - 25% of 256

⇒256 - 64

⇒192

Total number of Accountancy and Economics teacher = 160 + 192

⇒352

∴ The total number of teachers who teach Accountancy and Economics together is 352

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