The number of combinations of 10 items selected 7 at a time is

What the probability of the outcome of this question being 120 and how the anwer was obtained
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The number of different ways of selecting 7 objects out of 10 is 120. The probability of 120 being the right answer is 1 (certainty), 100%, because we don't select the answer out of a number of possibilities, there being only one correct answer.

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