JAMB - Mathematics (2012 - No. 37)
In how many ways can the letters of the word TOTALITY be arranged?
6720
6270
6207
6027
คำอธิบาย
\(\frac{8!}{3!}\)
\(\frac{8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{3 \times 2\times 1}\)
==> 8 x 7 x 6 x 5 x 4 = 6720
\(\frac{8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{3 \times 2\times 1}\)
==> 8 x 7 x 6 x 5 x 4 = 6720