To determine how many numbers have a sum of digits equal to nine, we consider the possible combinations of digits that add up to nine. These combinations include (9,0), (8,1), (7,2), (6,3), and (5,4). Therefore, there are five possible combinations of digits that sum up to nine.
252 combinations, :)
five
There are 2^5 = 32 different combinations of the five traits possible.
125
362,880 1x2x3x4x5x6x7x8x9=362,880
34
How many four digit combinations can be made from the number nine? Example, 1+1+2+5=9.
9000
There is 1 combination of all ten numbers, 10 combinations of one number and of nine numbers, 45 combinations of two or eight numbers, 120 combinations of three or seven numbers, 210 combinations of four or six numbers and 252 combinations of five numbers. That is 1023 = 210 - 1 in total.
9 combinations - the key person and one of the remaining nine.
Only one.