WorksheetsProbability Test #2 REVIEW
Total questions: 33
Worksheet time: 47mins
For each of the following determine if the random variable discrete or continuous.
Number of books in your locker
Discrete
Continuous
For each of the following determine if the random variable discrete or continuous.
Number of miles on your car
Discrete
Continuous
For each of the following determine if the random variable discrete or continuous.
Amount of money in your checking account
Discrete
Continuous
For each of the following determine if the random variable discrete or continuous.
Number of credits you have
Discrete
Continuous
What are the conditions for a variable to be binomial?
2 outcomes
Set number of Trials
Independent events
Set probability of success
All of these
What are the conditions for a variable to be geometric?
2 outcomes
Stop at first success
Independent events
Set probability of success
All of these
How do you distinguish between a geometric problem and a binomial problem?
Only geometric has success and failure
If events are independent
By when you stop
By looking for the word "exactly"
What does 8! mean?
8*7*6*5*4*3*2*1*0
EIGHT!
8+7+6+5+4+3+2+1
8*7*6*5*4*3*2*1
What counting method do you use when you are choosing from different groups?
Multiplication Counting Principle
Permutations
Combinations
Your fingers
What counting method do you use when order matters and repeats are ok?
Multiplication Counting Principle
Permutations
Combinations
Your fingers
What counting method do you use when order matters and repeats are NOT ok?
Multiplication Counting Principle
Permutations
Combinations
Your fingers
What counting method do you use when order doesn’t matter and repeats are NOT ok?
Multiplication Counting Principle
Permutations
Combinations
Your fingers
How many outfits are possible with 5 pairs of jeans, 8 t-shirts, and 2 pairs of shoes?
15
40
80
10
A team of 17 volleyball players needs to choose three players to refill the water cooler. How many different ways can the players be chosen?
3360
560
4080
680
How many 5-digit (numerical) passwords are possible for the school email system if the first digit cannot be 0?
11,424,400
10,967,424
9000
90,000
application to art school. If she has 25 to choose from, how many ways can she pick 4?
There are 10 men and 6 women working at a company. A hiring committee of 4 staff members is selected by a supervisor.
What is the probability that all 4 on the committee are men?
1820
0.115
210
0.400
There are 10 men and 6 women working at a company. A hiring committee of 4 staff members is selected by a supervisor.
What is the probability that the committee is made up of 3 women and 1 man?
0.110
0.011
0.008
0.115
Determine which distribution applies to the scenario.
Roll a die 20 times and let X be the number of times a 4 was rolled.
Binomial
Geometric
Neither
Determine which distribution applies to the scenario.
Flip a coin and let X be the number of flips to get a head.
Binomial
Geometric
Neither
Determine which distribution applies to the scenario.
Flip cards in a pile until you get a heart.
Binomial
Geometric
Neither
Assume that 13% of people are left-handed. Find the probability that...
The first lefty is the 7th person chosen.
0.944
0.623
0.377
0.056
Assume that 13% of people are left-handed. Find the probability that...
The first lefty is one of the first 7 people chosen.
0.944
0.623
0.377
0.056
Assume that 13% of people are left-handed. Find the probability that...
There are at least 3 lefties among a group of 8 people
0.074
0.987
0.926
0.061
Assume that 13% of people are left-handed. Find the probability that...
There are no more than 3 lefties among a group of 5 people.
0.061
0.013
0.9987
0.926
Assume that 13% of people are left-handed. Find the probability that...
If you kept selecting people until you get a lefty, how many people would expect to sample?
13
0.08
0.65
7.7
Assume that 13% of people are left-handed. Find the probability that...
If you kept selecting people until you get a lefty, what is the standard deviation of the distribution?
6.7
7.2
10
7.7
Assume that 13% of people are left-handed. Find the probability that...
How many lefties do you expect to find in the group of 5?
13
0.75
0.65
7.7
Assume that 13% of people are left-handed. Find the probability that...
If you're counting lefties in a group of 5, what is the standard deviation of the distribution?
13
0.75
0.65
7.7
Assume that 13% of people are left-handed. Find the probability that...
Choose the formula needed to determine the probability of it taking 5 people to find the first lefty.
(0.87)5(0.13)
(0.87)4(0.13)
5C4 (0.87)4 (0.13)
5C2 (0.87)3 (0.13)2
