state gov JSSC CGL Mock Test 2023 - 24 Quantitative Aptitude Average

The average age of boys in a school with 560 students is 12 years and that of girls is 11 years. If the average age of a school is 11 years 9 months, then what will be the number of girls in the school?

1
120 
2
150 
3
100 
4
140 
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