have Type AB blood.​ a) On​ average, how many donors must be checked to find someone with Type AB​ blood? b)​ What's the probability that there is a Type AB donor among the first 5 people​ checked? c)​ What's the probability that the first Type AB donor will be found among the first 6​ people? ​d) What's the probability that there​ won't be a Type AB donor before the 10th

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