The following table gives the results of a survey in which infants in the survey

Question

The following table gives the results of a survey in which infants in the survey are classified as having been immunized against some childhood disease, not immunized, whether the child's family has been classified as being below the poverty level, or not below the poverty level.

Below Poverty

Not Below Poverty

Immunized

5

55

Not immunized .   

15

25

What is the probability that an infant has been immunized given the family has been classified as being below the poverty level?

.6875

.60

.0833

.25

Below Poverty

Not Below Poverty

Immunized

5

55

Not immunized .   

15

25

Explanation / Answer

                             Below Poverty             Not below proverty        Total

Immunized                    5                                  55                       60

Not immunized              15                                25                      40

Total                            20                                 80                      100

P(Immunized/Below Poverty) = P(Immunized & Below Poverty) /P(Below Poverty)

                                         = 5/20 = 0.25

So,

Correct opion:

0.25

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