The number of boys in class is increased by 20% compared to previous year and that of girl has decreased by 20% .There is now one person more than before in the class .Number of students this year?
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The answer is 26
The previous year there were 25 students (15 boys and 10 girls)
15 + 20% = 18
10 - 20% = 8
This year there are 26 students (18 boys and 8 this is the answer
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