In a school 70% of the students are girls. The number of

In a school 70% of the students are girls. The number of boys are 510. Then the total number of students in the school is :

Percentage of boys
= 100% – 70% = 30%
Let total no. of students be x
∴ According to question,
30% of x = 510

∴ x =	510	× 100 = 1700
	30