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Earn +20 ptsQ: How many 3 digit combinations are there in 1 to 21?
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How many 5 digit number combinations from 1 to 60slide1?
There are 5,461,512 such combinations.
What combinations can you make with numbers 1 4 7 2 5 8 0?
Assuming the digits cannot be repeated, there are 7 combinations with 1 digit, 21 combinations with 2 digits, 35 combinations with 3 digits, 35 combinations with 4 digits, 21 combinations with 5 digits, 7 combinations with 6 digits and 1 combinations with 7 digits. That makes a total of 2^7 - 1 = 127: too many for me to list. If digits can be repeated, there are infinitely many combinations.
How many 5 digit combinations are there in 1 through 35?
100
How many two digit combinations for number 1 through 9?
44
How many 2 number combinations are there in the numbers 1 to 9?
There are 9C2 = 9*8/(2*1) = 36 2-digit combinations.
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