The director decides to add ... n... more females to the cast.
D. Write an expression that represents the probability that the set of siblings that consists of a brother and his 2 sisters are all in the chorus.
I'm not even sure where to begin with this but can whoever help me?
2n+___??
To determine the expression that represents the probability of having a set of siblings consisting of a brother and his two sisters in the chorus, we need to consider the total number of females and the total number of people in the chorus.
Let's break down the steps to find the expression:
Step 1: Determine the total number of females in the cast
Since the director decides to add "n" more females, the total number of females in the cast would be (n + 2). The "2" is already given because of the brother and his two sisters.
Step 2: Determine the total number of people in the chorus
To find the total number of people in the chorus, we need to consider the number of females and the number of other individuals (which could be males or individuals who don't have siblings in the chorus). Let's call the total number of people in the chorus as "T."
T = (n + 2) + "number of other individuals in the chorus"
Step 3: Determine the expression for the probability
The probability of having a set of siblings consisting of a brother and his two sisters in the chorus can be calculated by dividing the number of ways that this set can occur by the total number of possibilities.
The number of ways that this set can occur is 1 (since we are looking for a specific set).
Therefore, the expression for the probability is:
P = 1 / T
So the final expression is 1 / ((n + 2) + "number of other individuals in the chorus").