A patient has anti-K and anti-Jka. If approximately 91 percent of donors are K negative and approximately 23 p…

Question

A patient has anti-K and anti-Jka. If approximately 91 percent of donors are K negative and approximately 23 percent are Jka negative, about how many random donor units must be screened to find two compatible units?

Accepted Answer

보기 1: About 10 units

The probability that a unit satisfies both requirements is 0.91 multiplied by 0.23, which is about 0.21. Approximately one unit in five is compatible, so obtaining two compatible units requires screening about 2 divided by 0.21, roughly 10 units. Multiply the antigen-negative frequencies, then divide the number of units needed by that product.

Answer

보기 2: About 5 units

Answer

보기 3: About 25 units

Answer

보기 4: About 50 units

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A patient has anti-K and anti-Jka. If approximately 91 percent of donors are K negative and approximately 23 percent are Jka negative, about how many random donor units must be screened to find two compatible units?

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