Where do the points of concurrency of certain types of triangles lie?
the circumcenter of an obtuse triangle lies the triangle. the incenter of a right triangle lies the triangle. the point of concurrency of the angle bisectors of an acute triangle lies the triangle. the point of concurrency that is equidistant from the vertices of a right triangle lies the triangle.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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