Everything under the Sun
1)Which of these numbers cannot be a probability?
a.20%
b.0.5
c.1.001
d. 0
Ans. c
A jar contains 3 red marbles, 7 green marbles and 10 purple marbles.
If a marble is drawn from the jar at random, what is the probability that this marble is purple?
Ans. 1/2
A quiz contains three multiple choice-type questions and two true/false-type questions. Suppose you guess the answer randomly on every question. The probability of getting the scores are as follows: Score(0)=0.105, Score(1)=0.316, Score(2)=0.352, Score(3)=0.180, Score(4)=0.043, Score(5)=0.004
What is the probability of failing the quiz (getting score of below 4) by guessing?
Ans. 0.953
A bag contains 5 balls: 2 red (R) and 3 blue (B). In a game of chance, Amara takes a ball out of the bag without looking, notes down the color, and then puts it back into the bag. Amara then takes out another ball, notes down the color and puts it back into the bag.
How many possible outcomes are there?
Ans.25
Mrs. Castro asked her students to do an activity. Afterwards, her students noticed that the experimental probability of tossing tails is 48%, while the mathematical/theoretical probability is 50%. Being an attentive student, how would you explain this to your classmates?
a.The experimental probability is wrong.
b.We should always rely on mathematical/theoretical probability.
c.It is normal for experimental probabilities to vary from the theoretical probabilities but for a large number of trials, the two will be very close.
d.It is abnormal for the experimental probabilities to differ from the mathematical/theoretical probabilities because the results must be the same.
Ans. c
A spinner with three equal divisions was spun 1000 times. The following information was recorded. What is the probability of the spinner landing on RED in percent?
Spin on Blue=450, Spin on Red=270, Spin on Yellow=280
Ans. 27%
A bag contains 5 balls: 2 red (R) and 3 blue (B). In a game of chance, Amara takes a ball out of the bag without looking, notes down the color, and then puts it back into the bag. Amara then takes out another ball, notes down the color and puts it back into the bag.
What is the probability of drawing blue twice?
Ans. 9/25
Determine the number of three-digit numbers (without repetition) that can be written using the digits 1, 2, 3, 4.
Ans. 24
You Spin a spinner 25 times
yellow=lll purple=llll orange=lllll-lll white=lll red=ll green=lllll- blue=0
What is the experimental probability of NOT landing on yellow?
Ans. 22/25
In a 500-ticket draw for an educational prize, Ana’s name was written on 41 tickets. What is the probability that she would win? Express your answer in decimal.
Ans. 0.082
Jane wants ice cream. she can choose if it is in a (cup or cone), there are two flavors to choose (chocolate or vanilla) and three types of toppings (Sprinkles, nuts or strawberry)
What is the probability of having an ice cream with sprinkles as toppings?
Ans. 1/3
Jane wants ice cream. she can choose if it is in a (cup or cone), there are two flavors to choose (chocolate or vanilla) and three types of toppings (Sprinkles, nuts or strawberry)
how many total outcomes?
Ans. 12
A restaurant offers four sizes of pizza, two types of crust, and eight toppings. How many possible combinations of pizza with one topping are there?
Ans. 64
You go to Abenson to purchase a new television. You have the following choices: LCD or plasma; screen size 27”, 32”, 36”, 41”, 51”, or 63” and manufacturer Sony, LG or Phillips.
What is the probability of choosing of a Philips that is 32" plasma TV?
Ans. 1/36
When flipping 3 coins simultaneously, ,what is the probability of landing with 2 coins on head or 2 coins on tail?
Ans. 3/4
An experiment consists of three steps. There are four possible results on the first step, three possible results on the second step, and two possible results on the third step. The total number of experimental outcome is ___.
Ans. 24