At a coffee shop, 70% of the customers buy a coffee drink, 30% buy food, and 20% buy both a coffee drink and food. Are buying fo

Question

2 years ago

15

od and buying a coffee drink independent events? How do you know?

2 answers:

Shkiper50 [21] · Answer 1 · 2022-03-18T01:52:20+03:00

8 0

Yes.

70% of the customers buy a coffee drink and 30% buy food.

The sum of it is 100% already.

So 20% of it just another addition of information since it cannot exceed 100% of percentage (100% + 20% = 120%).

It also contains a subset for both percentage.

Bad White [126] · Answer 2 · 2022-03-18T02:57:17+03:00

8 0

Answer:

No

Step-by-step explanation:

If independent,

P(C^F) = P(C) × P(F)

0.2 = 0.3×0.7

0.2 = 0.21 is not a true statement