6
QuizMultiple Choice

The Multiplication Rule for Dependent Events

Question 6 • PISD-Statistics B 4th GP

A car wash has three different types of washes: basic, classic, and ultimate. Based on records, 45% of customers get the basic wash, 35% get the classic wash, and 20% get the ultimate wash. Some customers also vacuum out their cars after the wash. The car wash records show that 10% of customers who get the basic wash, 25% of customers who get the classic wash, and 60% of customers who get the ultimate wash also vacuum their cars. The probabilities are displayed in the tree diagram.

Question illustration
Answer
A
0.26
B
0.35
C
0.54
D
0.75
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