Hide 50% of rows with low value with MySQL

I have a table with three columns:

• Description (string)
• Value (integer from 1-3)
• Date

I want to build a select which returns:

• 100% of rows with value 3
• 50% of rows with value 2
• 25% of rows with value 1

Ordered by date. „Hiding“ rows with value 1 or 2 could be random but doesn’t have to (e.g. „hide“ every second row with value 2)

It this possible with one query and without additional PHP scripts?