12500 students appeared in an exam. 50% of the boys and 70% of the girls cleared the examination. If the total percent of student qualifying is 60% , how many girls appeared in the exam ?

I found something wrong with the solution... There is 50% and 70% boys and girls who cleared the examination, ( 𝙣𝙤𝙩𝙚: means who 𝙘𝙡𝙚𝙖𝙧𝙚𝙙 𝙤𝙣𝙡𝙮 𝙣𝙤𝙩 𝙩𝙝𝙤𝙨𝙚 𝙬𝙝𝙤 𝙖𝙥𝙥𝙚𝙖𝙧𝙚𝙙) (and later), total percent of student 𝙬𝙝𝙤 qualify the examination is 60% (𝙣𝙤𝙩𝙚: "qualifying 𝙨𝙩𝙪𝙙𝙚𝙣𝙩" again not including "non qualifying 𝙨𝙩𝙪𝙙𝙚𝙣𝙩' which is 40% where both boys and girls are included) then later find out n𝙪𝙢𝙗𝙚𝙧 of girls appeared in exam (𝙣𝙤𝙩𝙚: it means we have to find total no. Of girls thats it in which both qualified and non qualified is included) 𝙨𝙤 𝙨𝙤𝙡𝙪𝙩𝙞𝙤𝙣 𝙞𝙨 𝙣𝙤𝙩 𝙘𝙤𝙧𝙧𝙚𝙘𝙩 𝙗𝙚𝙘𝙖𝙪𝙨𝙚 𝙮𝙤𝙪 𝙝𝙖𝙙 𝙛𝙞𝙣𝙙 𝙤𝙪𝙩 𝙤𝙣𝙡𝙮 𝙣𝙪𝙢𝙗𝙚𝙧𝙨 𝙤𝙛 𝙜𝙞𝙧𝙡𝙨 𝙬𝙝𝙤 𝙘𝙡𝙚𝙖𝙧𝙚𝙙.... 𝙒𝙝𝙖𝙩𝙨 𝙖𝙗𝙤𝙪𝙩 𝙣𝙤𝙩 𝙘𝙡𝙚𝙖𝙧𝙚𝙙... 𝘾𝙤𝙯 𝙦𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙞𝙨 𝙖𝙥𝙥𝙚𝙖𝙧𝙚𝙙( 𝙞𝙣 𝙬𝙝𝙞𝙘𝙝 𝙗𝙤𝙩𝙝 𝙘𝙡𝙚𝙖𝙧𝙚𝙙 𝙖𝙣𝙙 𝙣𝙤𝙩 𝙘𝙡𝙚𝙖𝙧𝙚𝙙 𝙞𝙣𝙘𝙡𝙪𝙙𝙚𝙙)