of the 72 people who have taken their seats at a seminar, 6 have brown hair. considering this data, how many…
of the 72 people who have taken their seats at a seminar, 6 have brown hair. considering this data, how many of the next 84 people to take their seats should you expect to be brown - haired? brown - haired people
Answer
Explanation:
Step1: Calculate the proportion of brown - haired people
The proportion of brown - haired people among the 72 people is $\frac{6}{72}=\frac{1}{12}$.
Step2: Use the proportion to find the expected number
Multiply the proportion by the number of new people. So for 84 people, the expected number of brown - haired people is $\frac{1}{12}\times84 = 7$.
Answer:
7