Please help, and the explanation would really be appreciated :(

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

What is 6/10 rounded to the nearest half