Multiple choice softskills business skills

How will u invite atleast one person from a group of 10 persons

  1. 1022

  2. 1023

  3. 1024

  4. 1025
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To invite at least one person from 10, subtract the case of inviting nobody: 2^10 - 1 = 1024 - 1 = 1023. Each person has 2 choices (invited or not), giving 2^10 total subsets. Excluding the empty set leaves 1023 valid options.

AI explanation

For a group of 10 people, the number of ways to choose at least one person is the total number of non-empty subsets, which is 2^10 − 1 = 1023 (subtracting the one case of choosing nobody). This combinatorial trick — total subsets minus the empty set — is the standard way to count "at least one" selections.

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