Test
Chapter 11: Basic Probability & Statistics
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Preguntas del test (29)
1The probability of getting a head or tail in a fair coin is an example of a simple event.
- AVerdadero
- BFalso
2A compound event can be just one event.
- AVerdadero
- BFalso
3Events are considered mutually exclusive if they can't occur simultaneously.
- AVerdadero
- BFalso
4Events are independent if their occurrence does not change the probability that the other occurs.
- AVerdadero
- BFalso
5Conditional probability is the probability of another event happening given that another event has happened.
- AVerdadero
- BFalso
6A jar contains black and white marbles. Two marbles are chosen without replacement. The probability of selecting a black marble and then a white marble is 0.34, and the probability of selecting a black marble on the first draw is 0.47. What is the probability of selecting a white marble on the second draw, given that the first marble drawn was black?
- A100%
- B60%
- C72%
- D4%
7The probability that it is Friday and that a student is absent is 0.03. Since there are 5 school days in a week, the probability that it is Friday is 0.2. What is the probability that a student is absent given that today is Friday?
- A20%
- B35%
- C15%
- D55%
8At Kennedy Middle School, the probability that a student takes Technology and Spanish is 0.087. The probability that a student takes Technology is 0.68. What is the probability that a student takes Spanish given that the student is taking Technology?
- A10%
- B3%
- C13%
- D73%
9Out of the six balls given in a bag three are given to be white. Find the probability of not getting a white ball.
- A1/2
- B1/4
- C1/3
10We draw a card from a given deck of cards. Find the probability of not getting a jack or king.
- A11/13
- B3/13
- C2/5
- D6/7
11Spin a spinner numbered 1 to 7, and toss a coin. What is the probability of getting an odd number on the spinner and a tail on the coin?
- A3/14
- B2/7
- C5/14
- Dnone listed
12 A jar contains 6 red balls, 3 green balls, 5 white balls and 7 yellow balls. Two balls are chosen from the jar, with replacement. What is the probability that both balls chosen are green?
- A6/441
- B2/49
- C1/49
- DNone
13A jar contains 6 red balls, 3 green balls, 5 white balls and 7 yellow balls. Two balls are chosen from the jar, with replacement. What is the probability of choosing a red and then a yellow ball?
- A2/21
- B3/21
- C13/63
14Four cards are chosen from a standard deck of 52 playing cards with replacement. What is the probability of choosing 4 hearts in a row?
- A13/52
- B1/16
- C1/256
15 A nationwide survey showed that 65% of all children in the United States dislike eating vegetables. If 4 children are chosen at random, what is the probability that all 4 dislike eating vegetables? (Round your answer to the nearest percent.)
- A18%
- B260%
- C2%
16There are 30 children in a class and they all have at least one cat or dog.
14 children have a cat, 19 children have a dog.
What is the probability that a child chosen at random from the class has both a cat and a dog?- A1/10
- B2/15
- C1/6
- D1/5
17In a group of 25 boys, 20 play ice hockey and 17 play baseball. They all play at least one of the games.
What is the probability that a boy chosen at random from the class plays ice hockey but not baseball?- A1/5
- B8/25
- C12/25
- D4/5
18In a class of 29 children, 15 like history and 21 like math. They all like at least one of the two subjects.
What is the probability that a child chosen at random from the class likes math but not history?- A7/29
- B14/29
- C15/29
- D21/29
19In a class of 32 children, 16 have a skateboard, 12 have a bicycle and 17 have a scooter.
5 of them have a skateboard and a bicycle.
7 of them have a skateboard and a scooter.
4 of them have a bicycle and a scooter.
They all have at least one of the three things.
What is the probability that a child chosen at random from the class has a scooter but not a bicycle?- A9/32
- B5/16
- C13/32
- D1/2
20In a class of 35 children, 22 like bananas, 18 like cherries and 13 like strawberries.
7 of them like bananas and cherries.
8 of them like bananas and strawberries.
5 of them like cherries and strawberries.
They all like at least one of the fruits.
What is the probability that a child chosen at random from the class likes cherries only?- A8/35
- B11/35
- C13/35
- D3/7
21In how many ways can the letters of the word APPLE can be rearranged?
- A20
- B60
- C3
- D120
2210 students have appeared in a test in which the top three will get a prize. How many possible ways are there to get the prize winners?
- A20
- B620
- C720
- D82
23
Ellie want to change her password which is ELLIE9 but with same letters and number. In how many ways she can do that?- A59
- B179
- C83
- D7
24In how many ways the word HOLIDAY can be rearranged such that the letter I will always come to the left of letter L?
- A7!/2
- B2
- C7
25There are 6 people who will sit in a row but out of them Ronnie will always be left of Annie and Rachel will always be right of Annie. In how many ways such arrangement can be done?
- A120
- B220
- C20
- D40
26
Assuming that any arrangement of letters forms a 'word', how many 'words' of any length can be formed from the letters of the word SQUARE?
(No repeating of letters)- A82
- B720
- C1956
- D9331
2716 teams enter a competition. They are divided up into four Pools (A, B, C and D) of four teams each.
Every team plays one match against the other teams in its Pool.
After the Pool matches are completed:
• the winner of Pool A plays the second placed team of Pool B
• the winner of Pool B plays the second placed team of Pool A
• the winner of Pool C plays the second placed team of Pool D
• the winner of Pool D plays the second placed team of Pool C
The winners of these four matches then play semi-finals, and the winners of the semi-finals play in the final.
How many matches are played altogether?- A23
- B31
- C32
- D63
28A restaurant offers 5 choices of appetizer, 10 choices of main meal and 4 choices of dessert. A customer can choose to eat just one course, or two different courses, or all three courses. Assuming all choices are available, how many different possible meals does the restaurant offer?
- A329
- B310
- C200
- D19
29Central limit theorem means distributions of averages is only normal when formed from normal distributed data.
- AVerdadero
- BFalso
Información
- Descripción
- LSSGB Process Improvement Test sobre Chapter 11: Basic Probability & Statistics, creado por Christine Sanwald el 07/02/2017.
- Autor
- Christine Sanwald
- Idioma
- English
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- 1
- Etiquetas
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