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WorksheetsACC Probability Final Review SY2122
Total questions: 12
Worksheet time: 24mins
A bus is split into four grade levels. 9th grade has 14 people, 10th grade has 8 people, 11th grade has 6 people and 12th grade has 2 people. What is the probability that a 10th grader will walk off the bus first? (answer in simplest fraction)
7/15
1/3
4/15
2/53
John works as a car salesman. This month, he talked to 42 customers and was able to make 8 sales. At this rate, what is the probability that he will make a sale with the next customer to walk in? (Simplest Fraction)
17/21
4/17
13/17
4/21
When rolling two dice, what is the probability that the sum will be greater than or equal to 7? (Simplest fraction)
7/12
1/6
1/2
0
Given the following table, what is the probability that the next test grade will be exactly 94? (Simplest Fraction)
1/4
1/8
3/16
5/16
A small pet store has a dog, a cat, a bird, a hamster, a fish, a lizard, a snake, and rabbit. What is the probability that the next pet to be purchased will be a bird? (Answer in decimal form rounded to the nearest hundredth.)
0.12
0.16
0.13
0.17
Which outcome is likely to happen 1/6 of the time?
A
B
C
D
If you want your experimental probability to be as close as possible to your theoretical probability, what do you need to do?
Do 10 trials
Do 100 trials
Do 1000 trials
Do 10000 trials
In a bag of skittles, you have 3 red, 2 purple, 12 yellow, 5 green, and 3 orange. What probability of eating a red or purple skittle first? (Simplest Fraction)
1/4
1/5
1/6
1/3
Cathy is playing a game with a set of 52 cards. The cards are different colors and each shows a number.
· The probability of randomly selecting a red is 1/2 .
· The probability of randomly selecting a 5 is 1/13.
· There are exactly two cards in the deck that are red AND 5.
What is the probability of drawing a red OR a 5?
1/26
7/13
15/26
1/17
Amanda has three different colored pens in her book bag: blue, green and purple. The probability of randomly choosing a blue pen from Amanda’s book bag is 40%. The probability of randomly choosing a green pen from Amanda’s book bag is 1/10. What is the probability that Amanda will choose a purple pen from her bag in decimal form?
0.6
0.75
0.5
0.4
Amanda has three different colored pens in her book bag: blue, green and purple. The probability of randomly choosing a blue pen from Amanda’s book bag is 40%. The probability of randomly choosing a green pen from Amanda’s book bag is 1/10. If she has 20 pens in her bag, how many pens should be blue?
9
6
12
8
A spinner has 4 equal sections: Blue, Green, Red, and Yellow. You spin the spinner 500 times and land on red 75 times. What comparison can you make in regards to the experimental probability of red versus the theoretical probability of red?
The theoretical and experimental probabilities are equal
The theoretical probability is less than the experimental probability
The theoretical probability is more than the experimental probability
You need more information to find the theoretical probability.
