Question
There are 10% as many blue balls as grey balls in Risa's collection of balls. The number of black balls is 40% fewer than the number of grey balls. There are 350 more black balls than blue balls.
  1. Find the total number of balls in the collection.
  2. What percentage are the number of grey balls as compared to the number of black balls? Leave your answer as a mixed number in its simplest form.
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

There are 10% as many blue balls as grey balls in Risa's collection of balls. The number of black balls is 40% fewer than the number of grey balls. There are 350 more black balls than blue balls.
  1. Find the total number of balls in the collection.
  2. What percentage are the number of grey balls as compared to the number of black balls? Leave your answer as a mixed number in its simplest form.