i need a formula and the answer to this question : how many different 5 number combinations from 55 numbers???

use this formula

55x54x53x52x51/120

For combination, the formula is

No. of combination = n C r

where n is the no. of choices

r is the no. of value used for the combination

U also can use this, its the same

No. of combination = (n!)/[(n-r)!(r)!]

where n and r is the same as above and ! is the n value multiply by (n-1),(n-2),(n-3),...,3,2,1

So ur answer is

No. of combination = (55 X 54 X 53 X 52 X 51)/(5X4X3X2X1)

It depends on if the numbers can be repeated. If not then its really simple you can only have one of the numbers in each slot. so you would get 55*54*53*52*51 if it can repeat then 55*55*55*55*55. and there is your answer as long as your not calculating probabilities.

Use the binomial theorem. THe answer is 55 choose 5, as long as the numbers are all different.

5 times 55 (i think)

combination

55*54*53*52*51

permutation

55^5

nCr = (n!)/(k!(n - k)!)

55C5 = (55!)/(5!(55 - 5)!)

55C5 = (55!)/(120(50)!)

55C5 = 3478761