At the beginning of the school year to number 13 is in the band was the same as the number of students in the quiet throughout the School here the number of students in the band decreased by eight and the number of students in the choir decreased by four at the end of the school year the numbers in it in the car with 25% more than the number of students in the van how many students who are in the van at the beginning of the school year

Step-by-step explanation:

This question makes absolutely no sense, you either wrote it wrong or theres a mix up because there was no percentage at the beginning.

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐