Respuesta :
The percentage of the people that have A positive blood is 35.7%,
[tex]35.7\text{ \%=}\frac{35.7}{100}=0.357[/tex]The probability of the people that do not have A positive blood,
[tex]1-0.357=0.643[/tex]The probability of people with A positive blood is 0.357
The probability of people without A positive blood is 0.643
1) The probability that 3 people that do not have A positive blood
[tex]\begin{gathered} =0.643\times0.643\times0.643 \\ =0.2658\approx0.266(nearest\text{ 3decimal places)} \end{gathered}[/tex]2) The probability that 3 people have A positive blood
[tex]\begin{gathered} =0.357\times0.357\times0.357 \\ =0.0455\approx0.046(nearest\text{ 3decimal places)} \end{gathered}[/tex]