Answer: 30
Step-by-step explanation:
The combination of n things taking r at a time is given by :-
[tex]^nC_r=\dfrac{n!}{r!(n-r)!}[/tex]
Given : At a restaurant a menu has 5 salads and 6 entrees.
Then, the number of ways you can order a dinner that contains 1 salad and 1 entree will be :_
[tex]^5C_1\times ^6C_1\\\\=5\times6=30[/tex]
Hence, the number of ways you can order a dinner that contains 1 salad and 1 entree = 30
