Question

ACME Giant Rubber Bands come in all sizes, are fantastically elasitc, and are great at tripping road runners (when used properly). One such ACME plant produces super and super-duper sized giant rubber bands. The rubber bands are categorized by lot and size with the results shown in the following table. A giant rubber band is chosen at random from the population. Give your answers as decimals rounded to the nearest thousandth.

Lot	Super	Super-Duper	Total
A	88	12
B	165	35
C	260	40
Total

c.What is the probability that the giant rubber band is from Lot C or is super-duper?

Answer 1

lot	super	super-duper	total
A	88	12	100
B	165	35	200
C	260	40	300
Total	513	87	600

The probability that the giant rubber band is from Lot C or is super-duper

=P(Lot C) + P(super-duper) - P( Lot C and is super-duper )

=0.578

Addition rule of probability