1。 The first condition of the topic is that there are 60 people in the group and 3 people don't make flowers, so the number of people who make flowers is 60-3=57.
2。 The second condition is that there are 38 people who make red flowers, so only yellow flowers: 57-38= 19 people.
3。 Topic condition 3: 39 people who make yellow flowers, then those who only make red flowers: 57-39= 18 people.
4。 Results The number of people who made safflower and yellow flower was 57-( 19+ 18)=20.