The number of women in the group is 3 women/child * 30 children = <<3*30=90>>90 women.
The number of men in the group is 2 men/woman * 90 women = <<2*90=180>>180 men.
The total number of people in the group is 180 men + 90 women + 30 children = <<180+90+30=300>>300 people.
#### 300