Answer:A) 18
B) 12
Step-by-step explanation:
The ratio of North America butterflies to South America butterflies at a butterfly park is 5:3. The total ratio is 5 + 3 = 8
Let x represent the total number of south America and north America butterflies. If there are 30 North American butterflies at the butterfly park then,
5/8 × x = 30
5x = 30 × 8 = 240
x = 240/5 = 48
Therefore, the number of south America butterflies are
48 - 30 = 18
The ratio of South America butterflies to European butterflies is 3:2. Total ratio = 3 + 2 = 5
Let y represent the sum of South America and European butterflies. Therefore,
3/5 × y = 18
3y = 5 × 18 = 90
y = 90/3 = 30
Therefore, the number of European butterflies are 30 - 18 = 12
