a) If P(A)=1/3 and P(B)=3/5 and, A and B are mutually exclusive then P(A or B') = 14/5. Is it true or false? b) How many codes can be formed if a code is formed by a letter of the English alphabet and followed by a two-digit number?

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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Please help me verify my answers for the questions in the attached image.

My answers:
a) False

b) 2600 ways

a) If P(A)=1/3 and P(B)=3/5 and, A and B are mutually exclusive then P(A or B') = 14/5.
%3D
Is it true or false?
b) How many codes can be formed if a code is formed by a letter of the English alphabet and followed by a two-digit number?
Transcribed Image Text:a) If P(A)=1/3 and P(B)=3/5 and, A and B are mutually exclusive then P(A or B') = 14/5. %3D Is it true or false? b) How many codes can be formed if a code is formed by a letter of the English alphabet and followed by a two-digit number?
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