Question

maria has type b blood. she can safely receive blood transfusions from people with blood types o and b. what is the probability that a randomly chosen person from the united states can donate blood to maria?

Answers

  1. The probability that a randomly chosen person from the united states can donate blood to maria is 0.50
    considering blood to be of types A,B,AB and O
    further all blood groups are equi probable
    Probability of blood type A  = probability of blood type B = probability of blood type AB = probability of blood type O = x
    Probability of blood type A  + probability of blood type B + probability of blood type AB + probability of blood type O = 1
    ⇒ 4x = 1
    ⇒ x = 1/4
    Probability that a random person will have blood of type B or O = x+x
    = 1/4 + 1/4
    = 1/2
    = 0.50
    Hence we get the required answer.
    Learn more about Probability here:
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