engineering recuitment Vizag Steel MT Mechanical 2020 Test Series Quantitative Aptitude Average

In a school with 400 students, the average age of boys is 14 years and that of the girls is 12 years. If the average age of the school is 12 years and 9 months, then the number of the girls in the school is

1

450

2

250

3

150

4

350

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