Find the number of permutations in the word circus.

If the letters are considered distinct, then the number of permutations is .

If we count either C as the same character, then we would be double-counting - to correct this, we would simply divided by the number of ways we can choose C from the available characters, or .

B.     1.8 x 10⁴

Step-by-step explanation:

6.3 / 3.5 = 1.8

10⁷/ 10³ = 10⁴

Therefor

6.3 x 10⁷ / 3.5 x 10³ = 1.8 x 10⁴