(b) Work out the probability that both dice land on a number less than 3 [1 mark]
Mark scheme (a)
Answer
Mark
Comments
\(\dfrac{1}{3}\) or \(\dfrac{2}{6}\) or 0.33… or 33.(…)% on each top branch and \(\dfrac{2}{3}\) or \(\dfrac{4}{6}\) or 0.66… or 0.67 or 66.(…)% or 67% on each bottom branch
B1
accept any equivalent fraction, decimal or percentage
Additional guidance
Decimals must have at least 2 decimal places so do not accept 0.3 or 0.6 or 0.7
Only accept the percentages shown, do not accept 30% or 60%
Ignore working around the edge of the diagram
B1
Mark scheme (b)
Answer
Mark
Comments
\(\dfrac{1}{9}\) or 0.11… or 11.(…)%
B1
Additional guidance
Ignore probability words such as ‘unlikely’ or ‘evens’
