Seven professionals are standing in a row. A journalist is to the immediate right of a pharmacist and to the immediate left of a teacher. An advocate is on the How many triangles are there in the given figure?

- A.20
- B.15
- C.17
- D.19
Explanation
. We know that when we have a rectangle with 2 diagonals, then we have 2 × 4 = 8 triangles and we also know that when we have a triangle with one perpendicular, then we have 3 triangles so we have 4 such triangles then we have total 4 × 3 = 12 but we have to remove 4 triangles, then we have 12 – 4 = 8. Now, we have total 8 + 8 = 16 triangles and then start counting random triangles. FGFGA F G F G B E C D AFG, FBC, GED Therefore, we have total 19 triangles.