For this question, we're looking at the number of ways we can satisfy a certain condition (having Teresa and Julia be picked) over the number of ways a group of 2 students can be picked.
Since we don't care in what order people are picked, we're working with combinations, where the general formula is:
How many ways can 2 people be picked from a group of 10?
There's only one combination that allows Teresa and Julia to be picked.
Putting it together, we have
Teresa and Julia are among 10 students who have applied for a trip to Washington, D.C. Two students from the group will be selected at random for the trip. What is the probability that Teresa and Julia will be the 2 students selected?
About the group of students who are selecting 2 of their group at random to give a report, but assume that there are 7 males and 3 females.what is the prbability that 2 females are selected?what is the probability that 2 males are selected?
From a group of 3 men and 4 women, a delegation of 2 is selected at random. What is the expected number of men in the delegation? Round your answers to two decimal places as needed.Could someone help me with how to do this?
From a group of 3 men and 4 women, a delegation of 2 is selected at random. What is the expected number of men in the delegation? Round your answers to two decimal places as needed. Could someone help me with how to do this?
A group of students who are selecting 2 of their group at random to give a report, but assume that there are 5 males and 3 females. What is the probability that 2 females are selected? 2 males?
A professor of statistics noticed that the marks in his course are normally distributed. He has also noticed that his morning class average 73% with a standarddeviation of 12% on their final exams. His afternoon class average 77% with a standard deviation of 10%. What is the probability that the mean mark of four randomlyselected students from a morning class is greater than the average mark of four randomly selected students from an afternoon class?SHow you derived the answer
If two people are selected at random, what is the probability that they were both born in May?
Two representatives are chosen at random from a group of 100 students that has 50 girls and 50 boys. What is the probability that the representatives seledted are either both boys or both girls?
Interpret this interval.
What is the probability that at least 2 people in a random group of 4 people have a birthday on the same day of the week? Answer: