Friday

July 25, 2014

July 25, 2014

Posted by **Anonymous** on Saturday, June 7, 2014 at 12:58am.

P(not red) = ?

red | blue | green | yellow

----------------------------------------

20 | 10 | 9 | 11

(1 point)

a 0.6

b 0.4

c 0.2 <--------------

d 0.3

2. You roll a number cube 20 times. The number 4 is rolled 8 times. What is the experimental probability of rolling a 4? (1 point)

a 40% <--------------

b 25%

c 20%

d 17%

3. The table below shows the results of flipping two coins. How does the experimental probability of getting at least one tails compare to the

theoretical probability of getting at least one?

outcome|HH | TH | HT | TT

--------------------------

landed |28 |22 |34 | 16

A The experimental probability is 3% greater than the theoretical probability.

B The theoretical probability is 3% greater than the experimental probability.

C The experimental probability is equal to the theoretical probability. <-------

D The experimental probability is about 1% less than the theoretical probability.

4. The probability of winning a game is 15%. If you play 20 times, how many times should you expect to win? (1 point)

a 5 times

b 3 times<--------------

c 6 times

d 15 times

5. The probability of having a winning raffle ticket is 20%. If you bought 50 tickets, how many winning tickets should you expect to have?

a 5 tickets <----------

b 3 tickets

c 8 tickets

d 10 tickets

6. A company finds 5 defective toys in a sample of 600. Predict how many defective toys are in a shipment of 24,000.

a 40 toys <-----------

b 166 toys

c 200 toys

d 20 toys

7. Which of the following is an example of independent events?

A rolling two number cubes <-------

B selecting marbles from a bag without

replacement after each draw

C choosing and eating a piece of candy from a dish and then choosing another piece of candy

D Pulling a card from a deck when other players have already pulled several cards from that deck

8. A bag of fruit contains 4 apples, 1 plum, 2 apricots, and 3 oranges. Pieces of fruit are drawn twice with replacement. What is P(apple, then

apricot)? (1 point)

a 4/5

b 2/25

c 3/25

d 3/5 <---------------------

9. A coin is flipped three times. How the does P(H, H, H) compare to P(H, T, H)? (1 point)

A. P(H, H, H) is greater than P(H, T, H)

B. P(H, T, H) is greater than P(H, H, H). <-----------

c.The probabilities are the same.

d.There is no way to tell with the information given.

10. A coin is tossed and a number cube is rolled. What is P(heads, a number less than 5)? (1 point)

A 1/3

B 5/12

C 2/3

D 5/6 <----------------------

am i correct.

Just to let you know, i am really bad at math:(

1)20% chance of spinning each one

2)= 40 40% *20=8

3)since there are 4 outcomes, theoretical = 25% my changed answer is 25%.28+22+34+16= 100 100 / 4 = 25%

4)my changed answer 3 15% of 20=3

5)20=2 50=5 2*5=10 A

6)24000 / 600 = 40

7)self explanatory

8)apple+apricot =6 10 all together 6/10=3/5

9)since a coin flip is random,it is a higher probability of the outcome to be H T H or B

10)since it says less than 5 and there is 6 sides on a dice all together, it is 5/6.

PLEASE CHECK

- MATH -
**MathMate**, Saturday, June 7, 2014 at 8:04amI think you should spend more efforts in understanding how to solve the problems, in explaining how you solved the problems (whether correctly or not) in order to help yourself.

Trying to post under a different name and posting the same question multiple times, without showing any effort, is going to be a waste of effort on your part, and on the part of tutors who could better spend time in helping others.

A secret recipe to posting here is:

1. use the same name at all times. Tutors who don't necessarily answer your question will still check your progress and your efforts.

2. Ask one question at a time, and understand how to solve it, not just to get answers. Knowing the answer to one question does not help you get the next. Knowing how to solve one problem helps you when the next one comes along. You are working on a study guide, which is a check list of what you should know, and if not, should learn*how*to solve those problems, so that in the exam you will be capable of doing well.

Good luck, and hope you understand*why*you're working on these problems.

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