Answer:
84 ways
Step-by-step explanation:
The order in which the books are positioned is not important, so we use the combinations formula to solve this question.
Combinations formula:
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
In how many ways can this be done
2 math books, from a set of 7.
3 computer science books, from a set of 4.
So
[tex]T = C_{7,2}*C_{4,3} = \frac{7!}{2!5!}*\frac{4!}{1!3!} = 84[/tex]
This can be done in 84 ways
