Question

The partially filled contingency table gives the frequencies of the data on age (in years) and sex from the residents of a retirement home. 60-69 70-79 Over 79 Total Male 1 9 5 Female 19 2 4 Total What is the probability that a resident is female ? Round your answer to three decimal places if necessary. a. 0.635 c. 0.62 b. 0.629 d. 0.625 Please select the best answer from the choices provided A B C D

Answer 1

There are 19+2+4=25 women
There are 1+9+5=15 men

there are 25+15=40 people


P=25/40=0,625

The answer is D

Answer 2

Option:D

Explanation:

We know that probability of a function is the ratio of favourable cases to the total number of cases possible.

here we have to find the probability that a resident is female.

so it's
`Probability=(Total number of females)/(Total number of people)`

here the total number of females are=19+2+4

=25

and the total number of males=1+9+5

=15

Hence, total number of people=25+15=40

so
`Probability=(25)/(40)`

=0.625

Hence option D is correct.