sahil7389 wrote:
A pod of 6 dolphins always swims single file, with 3 females at the front and 3 males in the rear. In how many different arrangements can the dolphins swim?
A. 20
B. 36
C. 40
D. 18
E. 54
We are given that a pod of 6 dolphins always swims single file, with 3 females at the front and 3 males in the rear. Thus:
The number of ways to arrange the 3 female dolphins in the front is 3! = 3 x 2 x 1 = 6.
The number of ways to arrange the 3 male dolphins is in the rear is 3! = 3 x 2 x 1 = 6.
Thus, the number of ways to arrange all the dolphins is 6 x 6 = 36 ways.
Answer: B
_________________
Scott Woodbury-Stewart
Founder and CEO
GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions
close
81% (00:26) correct 
