Question

Please solve q 115 ?

Answer 1

`color(blue)(24)`

Answer 3

Explanation:

1 side of the triangle can be chosen in 4 different ways.

The other two sides can be chosen in `color(white)(0)^4C_2` ways

Total:

`4xxcolor(white)(0)^4C_2=4xx(4!)/(2!(4-2)!)=4xx24/4=24`