If in a class of 30 students10 take tea but not coffee and 14 then how many tea?

This problem is incomplete. You need to know how many students take coffee to solve this. Here's why:

* We know:

* 10 students take tea but not coffee.

* 14 students take something (we don't know what).

* To find the total taking tea, we need to know:

* How many of those 14 students take coffee only.

* How many of those 14 students take both tea and coffee.

Example scenarios:

* Scenario 1: If all 14 students take coffee, then 10 + 0 = 10 students take tea.

* Scenario 2: If 14 students take both tea and coffee, then 10 + 14 = 24 students take tea.

To get a correct answer, you need more information.