possible answers are
a. 360
b. 380
c. 3420
d. 6840
2007-06-15 08:28:30 · 6 answers · asked by Trinity 1 in Science & Mathematics ➔ Mathematics
18! = 18 * 17 * 16 * ...
20! = 20 * 19 * 18 * 17 * ... =
20 * 19 * (18 * 17 * 16 * ...) =
20 * 19 * 18!
so, 20! / 18! =
20 * 19 * 18! / 18! =
20 * 19 =
380
2007-06-15 08:31:54 · answer #1 · answered by iluxa 5 · 2⤊ 0⤋
380 Divided By 20
2017-01-19 04:33:56 · answer #2 · answered by ? 4 · 0⤊ 0⤋
20! divided by 18! is simply 20*19.
380.
2007-06-15 08:33:13 · answer #3 · answered by jjsocrates 4 · 1⤊ 0⤋
20! = 20*19*18!
So if we divide by 18!, we are left with
20*19 = 380.
Choice b. is correct.
2007-06-15 09:50:51 · answer #4 · answered by steiner1745 7 · 0⤊ 0⤋
20!/18!=20*19*18!/18!=
20*19/1=380
Hope this helps =)
2007-06-15 08:32:37 · answer #5 · answered by RScott 3 · 0⤊ 0⤋
what can you divide 18 by
2014-01-19 15:45:42 · answer #6 · answered by Anonymous · 0⤊ 0⤋