In this task, you need to provide the correct option for a given problem from the provided options.
Q: Problem: the ratio of boys to girl in a school is 5 : 4 . if there are 1500 boys in the school , how many girls are there ?
Options: a ) 300 , b ) 1200 , c ) 1500 , d ) 1800 , e ) 2000
A:
b