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# Steiner Triple System

COMBIN-EAYZZO

A BIBD in which $k=3$ and $\lambda=1$ is called a Steiner Triple System.

Which of the following are possible values of $v$ in a Steiner Triple System?

Select ALL that apply.

A

$3$

B

$4$

C

$5$

D

$6$

E

$7$

F

$8$