What Is the Incidence of Children Being Born with Down

question 91

Multiple Choice

What is the incidence of children being born with Down syndrome to a mother at age 45?

• A)1 in 120 births
• B)1 in 90 births
• C)1 in 60 births
• D)1 in 30 births

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Definitions:

Complement

In mathematics, a complement refers to the elements not in the subset of interest within a given set. In general language, it means something that completes or goes well with something.

P(A And B)

The probability that events A and B both occur.

P(A Or B)

The probability that at least one of two events, A or B, will occur.

Probability

A measure of the likelihood that an event will occur, expressed as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.