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17.10.2019 •
Mathematics
3. find all the solutions to 2x 42 242 +4y +8y +48y +5z = 8 +z = 7 +402 = 51 what is the unique solution with y=-7?
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Ответ:
6
Step-by-step explanation:
This is a case of combination since the order does not matter, it only matters that there must be a marble in each one inside, therefore we must apply its formula.
xCn = n! / x! * (n - x)!
n, in this case it would be 4 because we must subtract 2 from the total 6, since there must already be one inside in each display case.
x = 2, since it is the number of showcases.
Replacing:
2C4 = 4! / 2! * (4 - 2)! = 6
Which means that you can in six different ways.