Likelihood
a. impossible
b. unlikely
c. likely
d. certain
c. likely
A number cube is rolled. What is the probability of landing on a 3?
1/6 = 0.17 = 17%
Kyle rolled a number cube 10 times. He landed on 1 three times, 3 one time, 4 one time, 5 three times, and 6 two times. What is the relative frequency of landing on a 5?
3/6 = 0.5
A coin is flipped 300 times. In theory, how many times should it land on heads?
300/2 = 150
The probability of a couple having 4 boys is 0.0625. What is the likelihood of having 4 boys?
a. impossible
b. unlikely
c. likely
d. certain
b. unlikely
1/2 = 0.5 = 50%
A spinner has four sections: red, orange, yellow, and green. Out of 100 spins, it landed on red 23 times, orange 29 times, yellow 30 times, and green 18 times. Which color has an observed frequency closest to the expected frequency?
Expected frequency: 1/4 = 0.25 = 25%
Observed frequency
Red: 23/100 = 0.23
Orange: 29/100 = 0.29
Yellow: 30/100 = 0.3
Green: 18/100 = 0.18
A number cube is rolled 50 times. How many times should we expect it to land on the number 4?
50/6 = 8
There is a 50% chance of rain next week. What is the likelihood it will rain?
a. impossible
b. neither likely nor unlikely
c. likely
d. certain
A bag contains 12 red marbles, 14 purple marbles, and 4 blue marbles. What is the probability of drawing a purple marble from the bag?
14/30 = 0.47 = 47%
A coin was flipped 50 times. Of those, it landed on heads 28 times. Is the observed frequency greater or smaller than the theoretical probability?
Greater.
Observed: 28/50 = 0.56
Expected: 1/2 = 0.5
In a survey of 100 7th graders, 23 said that their favorite candy was Sour Patch Kids. Out of 275 7th graders, about how many can we expect to have a favorite candy of sour patch kids?
23/100 = 0.23
0.23*275 = 63.25
63
9/19 students have brown hair. How likely is it for a student to have brown hair?
a. impossible
b. neither likely nor unlikely
c. likely
d. certain
b. neither likely nor unlikely
A number cube is rolled. What is the probability of landing on a 2 or 6?
2/6 = 0.33 = 33%
A bag contains 25 skittles, with five of each color: red, orange, yellow, purple, green. Wes pulled 10 skittles from the bag. He got 3 red, 1 yellow, 3 green, 2 purple, and 1 orange. Which statement is true?
a. He chose orange more than expected.
b. He chose red less than expected.
c. The theoretical probability for each color is the same.
d. The experimental probability for each color is the same.
c. The theoretical probability for each color is the same.
Kayla recorded the number of people who wore school shirts to the track meet on Wednesday. Of 60 people, 24 wore school shirts. If 100 people are expected to attend next Wednesday, how many can we expect to be wearing school shirts?
24/60 = 0.4
0.4*100 = 40
40
12,398 students got into to FSU out of 50,629 applicants. How likely is it to get into FSU?
a. impossible
b. unlikely
c. neither likely nor unlikely
d. likely
b. unlikely
A school has 350 6th graders, 200 7th graders, and 250 8th graders. What is the probability of randomly selecting a 7th grader's name from a list of names?
200/800 = 0.25 = 25%
A number cube is rolled 200 times. It lands on 6 fifty times. Is this greater or lower than the theoretical probability?
Greater.
Experimental: 50/200 = 0.25 = 25%
Theoretical: 1/6 = 0.17 = 17%
A spinner has four sections: red, blue, green, and purple. If it is spun 2,398 times, about how many times should it land on red?
1/4 = 0.25
0.25*2,398 = 599.5
600