Question

a ratio of north america butterflies to soulth american butteries at a butterflies at the park is 5:3. the ratio of south american butterflies to eurpopean butterflies is 3:2. There are 30 north american butterflies at the butterflies at the butterfly park. how many south american butterflies are there

Answer 1

There are 18 south American butterflies in the park

Solution:

Given that , A ratio of north america butterflies to south american butteries at the park is 5 : 3

And the ratio of south american butterflies to eurpopean butterflies is 3:2.  

There are 30 north american butterflies at the butterflies at the butterfly park

Number of north America butterflies : number of south American butterflies = 5 : 3

30 : number of south American butterflies = 5 : 3

[ since there are 30 north butterflies ]

$\frac{30}{\text { number of south american butterflies }}=\frac{5}{3}$

$30 \times 3=\text { number of south American butterflies } \times 5$

$\text { Number of south American butterflies } \times 5=90$

Number of south American butterflies = 18

Hence, there are 18 south American butterflies in the park.