How many permutations can be made from the letters m, n, o, p, and q taken 3 at a time? 6 30 60

There are 5 letters m, n, o, p and q.
These letters can be arranged 5! ways.
5!=5×4×3×2×1=120
Now you are taking 3 at a time. 
So, 5!/3!=120/6
Now multiply this by 3. 
20×3=60.