A restaurant is offering a three-course meal consisting of one starter, one main course and one dessert - Leaving Cert Mathematics - Question 1 - 2020

From the information provided, Jack has 120 different three-course meal combinations available.

The number of available meal options can be modeled by the equation:

$4 imes 6 imes x = 120$

where x is the number of available desserts.

To find x, we can first simplify the left-hand side:

$24x = 120$

Now, dividing both sides by 24 gives:

$x = \frac{120}{24} = 5$

Therefore, the number of different desserts still available to Jack is 5.