Question

3.A,B,C,D and E are the different points on the circumference of a circle .How many triangles may

be drawn through these points.?

2)Banti had some amount of money.After spending Rs.30,2

3

of his initial amount was left with

him.What amount of money was left with him?​

Answer 1

Answer:

Triangle has three vertices, so we have to connect three points out of ten points to form a triangle, so number of ways three points can be selected from ten points is

10

C

3

.

Heptagon has seven vertices, so we have to connect seven points out of ten points to form a heptagon. So number of ways seven points can be selected from ten points is

10

C

7

.

The difference of those two is

10

C

3

−

10

C

7

=120−120=0.

Answer 2

Step-by-step explanation:

3) 120 - 120 = 0...........