Question 1
Subject:MathPrice: Bought3
Question 1. (a) How many different strings of 6 characters can be made from 8 characters A, B, C, D, E, F, G, H if each character appears at most one time in each string? For example, string is "ABCEFH" is valid. Explain and evaluate your answer. (b) A student needs to enrol 3 subjects from 8 available subjects for her last semester. How many different choices of 3 subjects that she can make? Explain and evaluate your answer.
