Let a Be the Set of All Strings of Decimal

question 46

Short Answer

Let A be the set of all strings of decimal digits of length 5. For example 00312 and 19483 are two strings in
A.
You pick a string from A at random. What is the probability that
(a) the string begins with 7575.
(b) the string has no 4 in it.
In questions 13-16 you have 40 different books (20 math books, 15 history books, and 5 geography books).

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Definitions:

USDA

Stands for the United States Department of Agriculture, a federal agency responsible for developing and executing federal laws related to farming, forestry, rural economic development, and food.

Public Outrage

A strong reaction from the general public expressing intense disapproval or anger towards a particular action or event.

Sugary Drinks

Beverages containing high amounts of sugar, which can contribute to various health issues like obesity and diabetes.

Health-related Problems

Issues concerning the physical or mental well-being of individuals, ranging from diseases to conditions that impair normal functioning.