Answer:
31
Step-by-step explanation:
First of,
or, in probability is subtraction and not means you shouldn't use green (therefore leaving you with yellow and red)
Red = 42
Yellow = 20
P(Yellow or Not Green) = [tex]\frac{R+Y}{2}[/tex]
⁘ [tex]\frac{42+20}{2}[/tex] = [tex]\frac{62}{2}[/tex]
Hence, 31
