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ANSWER
[tex]\begin{gathered} 1)0.50 \\ 2)0.70 \end{gathered}[/tex]EXPLANATION
1) The Probability that a real number between 4 and 6 was picked is the area under region B.
[tex]P(4&6)=0.50[/tex]2) The probability of picking a real number between 4 and 8 corresponds to the area under region B and C.
[tex]\begin{gathered} P(4&8)=P(C)+P(C) \\ =0.5+0.2 \\ =0.7 \end{gathered}[/tex]