Question

A diner asked its customers, 'Did you cook dinner last night?' The results on the survey are shown in the table below:

Male Female
Cooked dinner 315 289
Did not cook dinner 156 489


What is the probability that one of the customers chosen from this survey was a male and cooked dinner?

0.25

0.37

0.52

0.67

Answer 1

0.25

Explanation:

add all the possibilities up and divide them by (male that cooked dinner)

`(315)/(1249) =0.2522017=0.25`

Answer 2

Total number of persons that took this survey is 315+289+156+489 = 1249

To calculate required probability we need to divide number of males that cooked diner with the total number of persons in the survey.

315/1249 = 0.2522

If we round this to 2 decimals the answer is first option: 0.25