Question

A jar navy beans and white beans in a ratio of 1:9, and 90 of the beans are navy beans how many beans in total are there in the jar

Answer 1

There are 900 total beans. 

Answer 2

Given that in the jar, navy beans and white beans in a ratio of 1:9. Let the amount of navy beans be $x$.

Then, the amount of white beans in the jar is $9x$.

Given that amount of navy beans is $x=90$.

Total amount of beans in the jar is $x+9x=10x =10*90=900$.