Question

The following is a survey of the amount spent on the online purchasing based on 1000 online customers. JAmount Spent Age Group << $50 $50 - $99 $100 or more Total 300 120 50 470 30 or older 150 180 530 Total 450 300 250 1000 30 years 200 If a customer spent $100 or more, what is the probability that the customer is < 30 years? 50/1000 50/470 470/1000 50/250 QUESTION 30 PA)=0.25, P(B) = 0.4. If A and B are mutually exclusive, then, PIA union B) = 0.25 0.6 0.65 Click to

Answer 1

A) Given data

Customer spent 100 or more under<30 y group age is=50

Total number of customers under <30 y age group is =470

So required probability=50/470

30) P(A)=0.25

P(B)=0.4

Given that A and B are mutually exclusive

So P(A union B)=P(A)+P(B)

=0.25+0.4=0.65