Question 1199068
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(1) 3*2*1 = 6 different arrangements of the three groups of books<br>
(2) 3*2*1 = 6 different arrangements of the three statistics books<br>
(3) 2*1 = 2 different arrangements of the two epidemiology books<br>
(4) 3*2*1 = 6 different arrangements of the three economics books<br>
The total number of arrangements is 6*6*2*6 = 432<br>
ANSWER: 432<br>