Use the rules 𝑃(𝐴) = 1 − 𝑃(𝐴) and 𝑃(𝐴 ∪ 𝐵) = 𝑃(𝐴)+ 𝑃(𝐵) − 𝑃(𝐴 ∩ 𝐵).

mm-u1-t5-s2-d1

Request an applet

Describe what students should see or notice. That's the cue to build — requests are what get built next.