[SPM Add Math Permutation & Combination Q13 Solution] Anyone know how to solve this?

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Question

The diagram shows 8 points lie on two parallel lines.
Rajah di bawah menunjukkan 8 titik berada pada dua garis selari.

Calculate the number of different triangles can be drawn by connecting any three points when
Hitung bilangan segi tiga berlainan yang dapat dilukis dengan menyambungkan mana-mana tiga titik apabila

(a) no condition is imposed.
tiada syarat dikenakan.

(b) point Q is one of the vertices of the triangles.
titik Q merupakan satu daripada bucu segi tiga itu.

Solution


This is my idea for this question.

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