Triangles & Dice
Samples
Mean, Range & Median etc
Probability
100
A triangle has a 35 degree angle and a 73.5 degree angle. What is the third angle?
71.5 degrees
100
Mr. Brown wants to do a random sample of all 7th graders for the Talcott Mountain field trip. Should he ask:
a. 10 students who get ISS
b. 10 students who he likes the most
c. 10 students in 7th grade
d. 10 students from the whole school
c. 10 students from 7th grade
100
Who's average is higher?
Nellie: 82, 83, 85, 87
Sylvia: 75, 86, 88, 89
Nellie because the average of the numbers is higher for Nellie than Sylvia
100
8 cards with the numbers 1 through 8 are put in a hat and a card is selected at random.
Is it possible that a number 9 is selected?
No
200
If a triangle has angles of 35 degrees, 100 degrees, and 45 degrees, is it scalene, isosceles or equilateral?
Scalene
200
200 students at Burns were asked what their favorite cupcake flavor is.
75 said vanilla, 100 said chocolate and 25 said red velvet
In a group of 800, you would expect how many to say chocolate?
400
200
Who's range is higher?
Nellie: 82, 83, 85, 87
Sylvia: 75, 86, 88, 89
Sylvia because there is a bigger difference between the lowest and biggest number
200
8 cards with the numbers 1 through 8 are put in a hat and a card is selected at random.
Is it likely that a number greater than 5 is selected?
No. There is only a 3/8 possibility, which is less than half.
300
If a triangle has angles of 30 degrees, 70 degrees, and 80 degrees, is it obtuse, right or acute?
Acute, because none of the angles are 90 degrees (right) or more than 90 degrees (obtuse). They are all less than 90 degrees.
300
50 students at Burns were asked what their favorite cupcake flavor is.
10 said vanilla, 35 said chocolate and 5 said red velvet
There are how many times more students who said chocolate than vanilla?
3.5 times more students said chocolate than vanilla because 10x3.5=35
300
Who has a lower median?
Nellie: 82, 83, 85, 87
Sylvia: 75, 86, 88, 89
Nellie because hers is 84 and Sylvia's is 87
300
8 cards with the numbers 1 through 8 are put in a hat and a card is selected at random.
Can you be certain that a card with an odd or even number will be selected?
Yes, an even or odd number will definitely be selected
400
Which shape cannot be formed by doing a vertical slice perpendicular to the base of the square pyramid? a. trapezoid, b. line, c. square, or d. triangle?
Vertical: |, Horizontal: -
Square
400
50 students at Burns were asked what their favorite cupcake flavor is.
10 said vanilla, 35 said chocolate and 5 said red velvet
What percent prefer chocolate?
70%
400
What is the expected probability of having a sandwich as a lunch choice? Frequencies are Mac 'n Cheese 5, Sandwich 8, Soup 6, Burger 2, and Chicken Nuggets 1.
8/22
400
The other 7th grade class made a spinner with 3 equal sections of red, white, and blue. The observed outcomes were Red=40, White=28, Blue=32. If we spin the spinner 10 times, how many times would we probably get red?
4 times because 40/100 is .4 and .4x10=4
500
Two dice with the numbers 1 through 6 are rolled at the same time. What is the probability that both dice land on a 3 in one roll? Clue: multiply the two probabilities.
1/36
500
50 students at Burns were asked what their favorite day of the week is.
13 said Friday, 28 said Saturday, 4 said Sunday and 5 said Monday.
If we did a sample where 15 students said Sunday, then 16 students would say Monday.
No because 4/15 is not equal to 5/16.
500
A coin is flipped 6 times. It lands on tails 2 out of 6 times. The probability of a fair coin landing heads up is 1/2. Why is the observed probability different than the predicted probability?
The total number of coin flips was too small.
500
What is the probability of the arrow landing on a section labeled 12 on the first spin?
2/10 or 1/5 or .20 or 20%