Well, honey, if you're looking for the number of combinations of 4 numbers out of 45, it's 1,221,759. But let's be real, you're not gonna be manually counting all those combinations, so thank goodness for math and calculators. Just plug in those numbers and let the magic happen.
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To calculate the number of combinations of 4 numbers out of 45, we use the combination formula, which is nCr = n! / (r!(n-r)!). In this case, n = 45 (total numbers) and r = 4 (numbers chosen). Plugging these values into the formula, we get 45C4 = 45! / (4!(45-4)!) = 45! / (4!41!) = (45 x 44 x 43 x 42) / (4 x 3 x 2 x 1) = 1,086,132. Therefore, there are 1,086,132 possible combinations of 4 numbers chosen from 45.
45*44*43*42*41/(5*4*3*2*1) = 1,221,759
16
You can make 5 combinations of 1 number, 10 combinations of 2 numbers, 10 combinations of 3 numbers, 5 combinations of 4 numbers, and 1 combinations of 5 number. 31 in all.
There are 15 combinations.
90/2 = 45 180/4 = 45 and infinitely many more.