Given the frequency table below, what is the probability that a respondent is a child given...
Given the frequency table below, what is the probability that a respondent is a child given that the respondent prefers Brand 1? (keep two decimals)
| brand 1 | brand 2 | ||
| children | 25 | 75 | 100 |
| adults | 30 | 70 | 100 |
| total | 55 | 145 | 200 |
Homework Answers
Probably of those who prefer brand 1
= 55/200
Probability of a child preferring brand 1 is
=25/55
combining these two conditions together, the answer becomes
=(55/200) * (25*55)
= 25/200
= 0.125
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