To be divisible by 3 and 5, it is a common multiple of 3 and 5, and the formula document for finding the common multiple is difficult to write. Simply put, because there is no common multiple, the minimum common multiple is 3*5= 15, but you have selected 26 people, and the condition must be a common multiple of more than 26, that is, multiply 15 by the minimum multiple, and the result is.

Multiply by 2 to get 30. If it meets the requirements, then a * * * takes 30 people, that is, 4 people are selected.