Mrs Chan is planning to go shopping at the shopping mall. The probability that she will purchase over $1000 is 0.1, and the probability that she will purchase over $500 but not more than $1000 is 0.3. Find the probability that Mrs Chan will get at least one $100 cash coupon.
Mrs Chan is planning to go shopping at the shopping mall. The probability that she will purchase over $1000 is 0.1, and the probability that she will purchase over $500 but not more than $1000 is 0.3. Find the probability that Mrs Chan will get at least one $100 cash coupon.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Mrs Chan is planning to go shopping at the shopping mall. The probability that she
will purchase over $1000 is 0.1, and the probability that she will purchase over $500,
but not more than $1000 is 0.3.
Find the probability that Mrs Chan will get at least one $100 cash coupon.

Transcribed Image Text:A shopping mall is having a seasonal lucky draw. For every purchase over $500, a
customer can enter the lucky draw once. In the lucky draw, the customer draws a ball
from a box containing 80 balls in comprising four different colours. Each colour
represents a prize, as shown below.
Colour Number of balls
In the box
2
Red
Blue
Yellow
White
10
28
40
Prize
A gold coin
$100 cash coupon
$50 cash coupon
$20 cash coupon
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