Can someone explain this tree diagram for me? I understand why it’s 0.7 and why it’s 0.3 but what I don’t understand why it’s 0.4 shouldn’t it be 0.1? Shouldn’t it be 0.5 instead of 0.2?

Answer:66% have graduated within five years.Step-by-step explanation:It is given that 70% of freshmen went to public schools. Then the rest 30% i.e.,  [tex]$ \frac{30}{100} = 0.3 $[/tex] should have gone to other schools.Now, the number the freshmen in public schools is considered as 100% or 1. 60% of the freshmen from public schools have graduated means out of the total freshmen from public schools, 60% of them have graduated. That is why it is denoted as 0.6 and those not graduated as 0.4.Note that 60% of total students have graduated.Let us assume there were 100 students initially. Then 70 students went to public school. Number of students graduated = 60% [tex]$ \implies \frac{60}{100} \times 70  = 42 $[/tex]That is 42 students have passed from public school.Now, the ones in other schools:80% of them have graduated in other schools. That means out of total students 80% of them have graduated.That means [tex]$ \frac{80}{100} \times 30 = 24 $[/tex]24 students from other schools have passed.Therefore, totally 66 students have passed. i.e., 66 percent have passed.