CIE iGCSE Maths C8.1 Introduction to probability Exam Style Practice Questions- Paper 3

First, find the total number of balls: $6 + 4 + 2 = 12$. The scale has 6 intervals between $0$ (A) and $1$ (G), meaning each interval is $\frac{1}{6}$.

(a)
Probability of green = $\frac{4}{12} = \frac{1}{3} = \frac{2}{6}$. This corresponds to the second mark after $0$.
✅ Answer: C

(b)
There are no yellow balls, so the probability is $0$.
✅ Answer: A

(c)
Probability of NOT blue = $1 – \text{Probability of blue} = 1 – \frac{2}{12} = \frac{10}{12} = \frac{5}{6}$. This corresponds to the fifth mark.
✅ Answer: F