How many relations on $\{1, 2, 3\}$ contain the pair $(1, 2)$ ?

8

Correct answerYour answer

256

Correct answerYour answer

511

Correct answerYour answer

512

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

Worth noting

$2^{9} - 1$ removes only the empty relation; half of all relations lack $(1, 2)$ .

Ten questions from Relations & Functions, at your own pace.

Ten questions from Relations & Functions, at your own pace.

How many relations on {1,2,3}\{1, 2, 3\}{1,2,3} contain the pair (1,2)(1, 2)(1,2)?