Answer:
270 girls
Step-by-step explanation:
Total number of students = 380
Play musical instrument = 70%
Boys who play musical instrument = 60%
Number of girls who play musical instrument = 200
How many girls are in the class?
Number of play musical instrument = 70% of 380
(0.7 * 380) = 266
Since number of girls who play musical instrument = 200
Then number of boys who play = (266 - 200) = 66
Hence, 66 boys is equivalent 60% of the boy's population
Let population of boys = b
0.6b = 66
b = 110
Number of girls in class :
Number of boys + number of girls
110 + number of girls = 380
Number of girls = 380 - 110
Number of girls = 270
