There are 40 counters in a bag. 13 are red, 20% are green and the rest are yellow. What proportion of counters are yellow?
20% green counters - means 1/5 of all counters are green. 1/5 of 40 = 40/5 = 8 counters are greenthe number of counters that are green + the number of counters that are red = 8 + 13 = 21the number of counters that are yellow = 40 - 21 = 19the proportion of counters that are yellow = 19/40 (simplest form as cannot be simplified)
Related Maths GCSE answers
All answers ▸How do I find the length of a side of a triangle using the cosine rule?
Factorise the following- A) 4x+12xz. B) 3xy + 6y d) 4A^2B^2+ 8AB^2 +16AB^3
What is an inverse function?
The functions f and g are defined on R , the set of real numbers by f(x) = x^2 - 5x +2, and g(x) = 1 - x. Find h(x) = f(g(x)), and j(x) = g(f(x)).