Of the 350 students in a hall, 20% are girls. Then, 50 more girls entered the hall. Now, what percent of students in the hall are girls

Question

Mathematics

Kyan Lowe

2 December, 23:54

Of the 350 students in a hall, 20% are girls. Then, 50 more girls entered the hall. Now, what percent of students in the hall are girls

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Hugh Foster · Answer 1

Original = 350 students 20% are girls - - > 350*0.20 = 70 girls.

New = Since it is adding 50 girls that means the overall population has to add 50 as well - - > 350 + 50 = 400 students. 70 girls originally + 50 extra girls = 120 girls. 120 divided by 400 = 30% of the students are girls