Dear,

Sir I have a promblem that my upcoming test of maths is qudrilateral But our school is started another chap. i.e. probablity

so what i have to do to focus on ur test or in school

It would be better for you if you give preference to the chapter currently being taught in your school. If you have enough time, you can devote some time preparing for the quadrilaterals test, and after Probability is finished in your school, you can devote more time to quadrilaterals, so that you do not lag behind.