The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.
-What is the probability that at least 2 of the first 10 blood donors has Type B blood?

Name: The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school. -What is the probability that at least 2 of the first 10 blood donors has Type B blood?
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P ( X \geq 2 ) = 1 - P ( X \leq 1 ) = 1 - \left[ \left( \begin{array} { c } 10 \1\end{array} ight) ( 0.11 ) ^ { 1 } ( 0.89 ) ^ { 9 } + \left( \begin{array} { c } 10 \0\end{array} ight) ( 0.11 ) ^ { 0 } ( 0.89 ) ^ { 10 } ight] = 1 - 0.6972 = 0.3028

The American Red Cross Says That About 11% of the U.S