Y9X
Ye Olde Bag O' Marbles
One Die, Two Dice
Cardsharks
Category Z
100
In a class there are 12 people wearing T-shirts and 18 wearing sweaters. What is the probability that you pick one and they are wearing a sweater?
60%
100
What is the probability that you pick a green ball from a bag containing 4 green balls and 4 red balls?
½ or 50%
100
What is the probability that you roll a two dice and get two 5's?
1/36
100
What is the probability of drawing an ace off the top of a deck of cards?
1/13 = 0,077 = 7,7%
100
I have 6 books at home. How many ways can I give my three best friends a book?
6 x 5 x 4 = 120
200
How many different ways are there to arrange 4 people from the class in a row?
4 x 3 x 2 x 1 = 24
200
What is the probability that you draw two green marbles in a row from a bag containing 4 green marbles and 4 red marbles (not replacing the marbles)?
½ x 3/7 = 3/14 or 21.4%
200
You roll a die 4 four times and get a 3, a 4, a 5, and a 6. What is the probability that the next time you roll it you get a 6?
1/6 = 17%
200
What is the probability of drawing either a queen or a heart from the top of a deck of cards?
(4+12)/52=4/13=30.8%
200
How many four digit phone codes can I make if the first two numbers need to be the same, but all the others need to be different.
10x1x9x8 = 720
300
10 students in a class wear glasses, and 15 don't. If you pick two students, what is the probability that you pick one who wears glasses and one who doesn't?
50%
300
You have a bag of marbles in 5 colours. You pull a marble out, check its colour, and put it back in filling out the following table.
Find the following values, if possible: Mean, Median, Mode, Range.
Mode: Yellow
300
Find the mean, median, and mode of the data
Mean: 3,9
Median: 4
Mode: 5
300
Ms. Ekedahl puts the data from her most recent checkpoint into a frequency table. Calculate the median score.
5.5 points
300
What is the probability that you spin this spinner twice and get the same colour both times?
1/5
400
On a 10 question multiple choice test with 2 options for each question, what is the probability that you get 100% by guessing each answer?
50%
lol jk.
(½)10 = 1/1024 = 0,098%
400
A bag of marbles contains 6 red marbles and 2 blue marbles. What is the probability that you pull two out and get the same colour on both?
6/8•5/7+2/8•1/7=4/7=57.1%
400
What is the probability that you roll three dice and get at least one 3?
91/216=42%
400
How many different 5 card hands are possible given a standard 52-card deck?
(52*51*50*49*48)/(5*4*3*2*1)=2 598 960
400
The probability that it will rain each of the next three days is 40%. What is the probability that it will rain at least one of these days?
1 - (0.6)3 = 1 - 0,216 = 78.4%
500
How many ways are there to line up 6 students if 3 of them need to be standing next to each other?
4 x 3 x 2 x 1 x 3 x 2 x 1 = 144
500
You have a bag containing 3 blue marbles, 3 red marbles, and 3 green marbles. If you pull three marbles out, how many different combinations of marbles could you get?
10
500
You roll three dice. What is the probability that the sum of their faces is at least 4?
Complementary event: The sum of their faces is 1.
1 - (1/6)3
215/216 = 99.5%
500
What is more probable?
1. Drawing 5 card hand with at least 1 face card (J, Q, K, A) from a standard deck of 52 cards
-or-
2. Guessing all questions correctly on a yes/no quiz with 3 questions?
Drawing at least one face card (85,5%). Guessing correctly is 12,5%.
500
The mean of three numbers is 10. If the median is 14, what is the range of the numbers?
14