Can you form a triangle?
A box contains 7 rods measuring 15 cm, 15 cm, 30 cm, 40 cm, 60 cm, 60 cm and 90 cm.
THREE of theses rods are randomly chosen.
What is the probability that they can be arranged to form a triangle?
The probability can be expressed as a/b for co-prime positive integers a and b, find the value of a+b.
The answer is 46.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
11/35 (We can make 11 triangles from 35=(7 * 6 * 5)/(3 * 2) possible ones). 11 +35 =46