GMAT Exam

ABCDE is a regular pentagon with F at its center. How many different triangles can be formed by joining 3 of the points A,B,C,D,E and F?

Read Solution (Total 1)

20 different triangles can be formed.

There are 6 points = A,B,C,D,E,F
And 3 points to make a triangle.

So total triangles is 6C3 ways = (6*5*4) / (3*2*1) = 120/6 = 20 ways
12 years agoHelpfull: Yes(5) No(0)

GMAT Other Question

Of the applicants passes a certain test, 15 applied to both college X and Y. If 20 % of the applicants who applied college X and 25% of the applicants who applied college Y applied both college X and Y,how many applicants applied only college X or college Y? A certain quantity is measured on two different scales, the R-scale and the S-scale, that are related linearly. Measurements on the R-scale of 6 and 24 correspond to measurements on the S-scale of 30 and 60, respectively. What measurement on the R-scale corresponds to a measurement of 100 on the S-scale?