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Earn +20 ptsQ: How many different combinations of 4 numbers from 1 to 7?
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How many different combinations of six with eight numbers?
There are 8C6 = 8*7/(2*1) = 28 combinations.
How many number combinations are there if there are six numbers and you have to have a four number combination?
all numbers have to be different 720 360 (6*5*4*3*2*1), * * * * * Wrong. Combinations do not have to be different. Those are permutations. There are only 6C4 = 6*5/(2*1) = 15 combinations.
How many different 5 number combinations can you get using numbers 1 through 39 with no doubles?
575757
How many different combinations of 5 numbers 5 number combination?
120 WRONG! That is the number of PERMUTATIONS. In the case of combinations, the order of the numbers does not matter, so there is only 1 5-number combination from 5 numbers.
How many different 4 digit combinations are there for numbers 1 2 3 4 5 and last numbers are 4 5 no restrictions numbers can be repeated?
9
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