A probability tree with an aligned matrix listing the possible outcomes, their probabilities and three columns for events described in later tasks. It uses the graphdrawing library and requires LuaLaTeX.
% !TeX lualatex\documentclass[tikz,border=0.5cm]{standalone}\usetikzlibrary{graphs,graphdrawing,quotes,matrix,calc}\usegdlibrary{trees}\begin{document}\begin{tikzpicture}\graph [tree layout,grow=right,level distance=20mm,sibling distance=10mm,edge quotes={auto,node font=\footnotesize,inner sep=1pt,outer sep=2pt,shape=circle}]{root [as=,inner sep=0pt] -> {NR [> "0.8"{',blue,draw}, as=$\bar{R}$] -> {T2 [> "0.9"{',blue,draw}, as=$T$] -> {NRTNZ [>"0.4"', as=$\bar{Z}$],NRTZ [>"0.6" {blue,draw}, as=$Z$]},D2 [> "0.1", as=$D$] -> {NRDNZ [>"0.5"', as=$\bar{Z}$],NRDZ [>"0.5", as=$Z$]}},R [> "0.2", as=$R$] -> {T1 [> "0.25"', as=$T$] -> {RTNZ [>"0.4"', as=$\bar{Z}$],RTZ [>"0.6" {blue,draw}, as=$Z$]},D1 [> "0.75" {blue,draw}, as=$D$] -> {RDNZ [>"0.9"', as=$\bar{Z}$],RDZ [>"0.1" {blue,draw}, as=$Z$]}}