bac-s-maths 2025 Q4

bac-s-maths · France · bac-spe-maths__metropole-1 Probability Definitions Finite Equally-Likely Probability Computation
4. An individual is said to be a "universal donor" when their blood can be transfused to any person without risk of incompatibility. Blood group O with negative rhesus is the only one satisfying this characteristic. [Figure]
Show that the probability that an individual chosen at random from the French population is a universal donor is 0.0714.
The events $A , B$ and $C$ form a partition of the sample space, so, according to the law of total probability, we have: 
4. An individual is said to be a "universal donor" when their blood can be transfused to any person without risk of incompatibility.\\
Blood group O with negative rhesus is the only one satisfying this characteristic.\\
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Show that the probability that an individual chosen at random from the French population is a universal donor is 0.0714.\\
Paper Questions
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