a choir teacher took the students who have enrolled in her class so far and classified them by which parts…
a choir teacher took the students who have enrolled in her class so far and classified them by which parts they sing. tenors 6 altos 7 sopranos 13 considering this data, how many of the next 32 students to join should you expect to be sopranos? sopranos
Answer
Explanation:
Step1: Calculate total students so far
$6 + 7+13=26$
Step2: Calculate proportion of sopranos
The proportion of sopranos among the students so far is $\frac{13}{26}=\frac{1}{2}$
Step3: Calculate expected number of sopranos in new - comers
Multiply the proportion by the number of new students. $\frac{1}{2}\times32 = 16$
Answer:
16