the strength of a school is 2000.if 40% of the students are girls then how many boys are there in the school??

Question

answer should with statments.

Answer 1

You probably meant that the total enrollment is 2000, and 40% are girls.  (Strength is not the right word.)

 

Boys: 60% of total;  "OF means multiply, and 60% can be written decimally as 0.6

 

Proceed, whilst wearing a thinking cap.