E x p e r i m e n t
Total number of letters = 10
Repeated letters = 3 e
Total arrangement from the 10 letters = 10!
Because of the repeated letters = 10! / 3!
= (10 × 9 × 8 × 7× 6 × 5 × 4 × 3!) / 3!
= 10 × 9 × 8 × 7× 6 × 5 × 4
= 604800
604800 distinct arrangements.
The answer is a is greater than or equal to 13 :)
In geometry, a triacontagon or 30-gon is a thirty-sided polygon<span>. The sum of any triacontagon's interior angles is 5040 </span>degrees<span>.</span>