Question 1073948
Suppose a bookcase shelf has 5 Mathematics texts, 3 Biology texts, 
6 Chemistry texts and 4 Physics texts. Find the number n of ways 
a student can choose: 

a. one of the texts;<pre>n = 5+3+6+4 = 18 ways</pre>b. one of each type of text.<pre>n = 5×3×6×4 = 360 ways

Edwin</pre>