Probability
1/6
Make a frequency table for the following numbers:
1, 1, 2, 1, 3, 2, 1, 3, 4, 4, 3, 2, 1, 4
On the left of the table should be the numbers 1-4
There are five 1s, three 2s, three 3s, three 4s.
What is the relative frequency for the cost of food in Finnish Schools from the tables and graphs question 200.
Finland: 11kr out of 32.5
Divide these numbers and multiply by 100
33,8%
34, 36, 33, 34, 37, 39------what is the mean?
35,5
44, 42, 50, 44, 42, 42----What is the mode?
42
When throwing a coin, the chance of it landing on head is 50%. If you throw the coin 500 times, how many times will it land on head?
250 times - half the times
The cost of school lunches in different countries:
Sweden: 10kr per student
USA: 8 kr per student
China: 3,5 kr per student
Finland: 11 kr
Draw a bar graph with this information
The x axis (bottom) should list the countries, the y axis (up and down) should be numbers from 0 - 12 or close to 12. Each country should have a bar up to their number
In 7G there are 22 students. 4 of them have one pet. What is the relative frequency?
4/22 = 0.1818181818
Which equals 18.18%
81, 88, 80, 72, 77, 80----Find the median
72, 77, 80, 80, 81, 88
Median is 80
44, 15, 62, 53, 40, 62----What is the range?
62 - 15 = 47
In a bowl there are red and yellow balls. If you pick up a random one, the probability is 10% to draw one of the five yellow balls. How many red bullets are in the bowl?
Yellow balls: 5 of them are 10% so 100% would be 50 of them
Red balls: 45 of them
33.3 , 50.7 , 132.5 , 1000 , 5 ------What is the mean?
244,3
29, 33, 21, 15 , 11, X. If the range is 26, what is X?
11 is the lowest, the difference is 26, so X must be 37
In a box there are beads of three different colors.
If you reach in and pick up a bead, the likelihood is 3/5 that the ball is blue. The likelihood that the ball is green is 1/4. There are 30 red balls in the box. How many of the bullets in the box are blue
Blå: 3/5=60%
Grön: 1/4=25%
Sannolikheten att kulan är röd är: 15 % left
30 kulor =15%
60% = 120 kr because 15x4 is 60
Svar: 120
5, 100 , 45.6 , 354.6 , 555 , 29.8
5 , 29.8 , 45.6 , 100 , 354.6 , 555
100 + 45.6 (both are in the middle) and divide by 2
=72,8
10, 11, 12, 13, 13, 12, 11, 10 ----What is the mode?
None, they all appear the same amount of times
When you throw two six-sided dice, the sum could be the numbers 2 - 12.
How many possible outcomes are there when throwing two dice?
36
Mr. Breton went bowling and played 4 games. Game 1 he scored 99, game 2 he scored 101, game 3 he scored 90. The average for his 4 games was 100, so what did he score in the fourth game?
Average 100 in 4 games = 400 points total.
so far he has 190 points (add up the first 3 games)
400-290 = 110 points in the final game
Ms. Wurst is in SFI - On her first test she got 91, on the second she got 89, on the third she got 90. She took three more tests and got the same score on all of them (the mode). If her mean on all 6 tests was 91, what did those last 3 tests have to be?
-91 average on 6 tests = 546
-Subtract the tests we know (546-91-90-89=276)
-Since the last three tests were the same score, divide by three (276 / 3 = 92)
-She got 92 on the other 3 tests and that is the mode