Question

ten points are marked on straight line and 11 points are marked on another line how many triangles can be constructed with vertices from among the above points a)550 b)440 c)1045 d) none of these​

Answer 1

Answer:

C) 1045

Step-by-step explanation:

According to question, A triangle can be formed by selecting two points from 11 points and 1 point from 10 points.

OR

Two points from 10 points and 1 point from 11 points.

Therefore, Number of ways

= 11C2×10C1+10C2×11C1

= 495 + 550 = 1045

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