In a botanical survey of a large woodland area, trees are classified as being either Deciduous or Evergreen.
Of the Deciduous trees, 90% are found to be carrying a specific fungal infection. Of the Evergreen trees, 25% are found to be carrying the same infection.
The proportion of trees in the woodland that are Deciduous is kkk.
Draw a tree diagram to represent this information.
In the survey, 70.5% of all trees were found to be carrying the infection.
Find the value of kkk.
One tree is selected at random from the woodland. Given that this tree is infected, find the probability that it is a Deciduous tree.
Practise Edexcel A Level Maths Conditional Probability with exam-style questions for A Level Maths. 152 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
