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?
The length of time to complete a door assembly on an automobile factory assembly line is normally distributed with mean μ=6.7 minutes and standarddeviation σ=2.2 minutes.For a door selected at random, what is the probability that the assembly-line time will bea) 5 minutes or less?b) 10 minutes or more?c) between 5 and 8 minutes?Please show work.
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?
For a poll, 60 students were selected at random from the 6000 students at Calgon Community College. It turns out that 12 were in favor of higher parking fees to support extra police patrols of parking lots on campus. In this example, the sample proportion is:
Assume that 3 digits are selected at random from the set {1,3,5,6,7,9} and are arranged in random order. What is the probability that the resulting 3-digit number is less than 700?I know the sample space is P(6,3) but that is all I know. Help!
. Two numbers are selected at random ( without replacement ) from the first six positive integers . Let X denote the larger of the two numbers obtained . Find E(X).
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 six people two individuals are to be selected at random .How many possible selections are there?
What is the probability that one selected at random will read between -1.2 and 1.3 knots?
If two people are selected at random, what is the probability that they were both born in May?
From the 10 points that are placed on a circumference, two are selected randomly. what is the probability that they are adjacent?