there were 12 puppies but the number of puppies decreased by 25% when some were adopted. how many puppies remain?

9

Step-by-step explanation:

Number of puppies before adoption = 12

Number of puppies that remain = 12 - 3 = 9

< 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⭐