the number i have is 91367, now many permutations and combinations of this number are there and what are they?
2006-11-06 03:47:31 · 5 answers · asked by anthony b 1 in Science & Mathematics ➔ Mathematics
one combination of 5 digits and 120 permutation.
one combination 5 digits can be picked in only one way
19367 91367 all are same.
for permutation
both the above are different
1st letter 5 choices , 2nd letter 4 choces so on .
number 5*4*3*2*1 = 120 choices
2006-11-06 03:53:50 · answer #1 · answered by Mein Hoon Na 7 · 1⤊ 0⤋
In the first digit there are 5 possibilities: 9 or 1 or 3 or 6 or 7. If 9 is used in the first digit, then it can't be used in the second or third or fourth or fifth. so the second place only has 4 possibilities, the third has 3, the fourth as 2 and the last has 1.
So...
5 x 4 x 3 x 2 x 1 = 120 combinations.
2006-11-06 11:54:48 · answer #2 · answered by borscht 6 · 0⤊ 0⤋
permutation means arranging certain items where the order is important and combination implies arranging different items where the order doesnt matter.. so, the combination of ur 5 digit number is one.. since 31769 is the SAME COMBINATION of 91367..
on the other hand, permutation of ur 5 digit number will be 5! which is equal to 5*4*3*2*1=120
2006-11-06 12:08:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
120
2006-11-06 11:54:56 · answer #4 · answered by pcar964 3 · 0⤊ 0⤋
5x4x3x2x1=120
2006-11-06 12:01:32 · answer #5 · answered by jayktee96 7 · 0⤊ 0⤋