.In a warehouse, there are 40 guitars, 60 bass guitars, and 20 snare drums. An instrument is randomly selected to check the storage conditions. Drag and drop the correct value into the box to complete the statement. The probability that the selected instrument is a snare drum is
1:4/5
2:1/5
3:5/6
4:1/6
1:4/5
2:1/5
3:5/6
4:1/6