## anonymous one year ago help!

1. anonymous

@freckles @aaronq

2. anonymous

3. anonymous

@heretohelpalways

4. anonymous

@Michele_Laino

5. anonymous

@Nnesha

6. anonymous

We know that there are 33 students in all, and 12 boys. Do you know the answer now?

7. Michele_Laino

possible outcomes= 21+12=... favorable outcomes= 12

8. anonymous

b?

9. anonymous

no

10. anonymous

11. anonymous

the denominator of you probability would be 33 since there are 33 people in all

12. Michele_Laino

no, I'm sorry the definition is: probability= favorable outcomes/ possible outcomes

13. anonymous

ok

14. anonymous

d?

15. Michele_Laino

21 is the number of girls

16. anonymous

no, since 21 is the number of girls

17. imqwerty

evryone like to help u :D

18. anonymous

the number of boys would be 12

19. anonymous

ok so A?

20. anonymous

no

21. anonymous

ok so then C?

22. anonymous

remember that I told you denominator of your probability would be 33

23. anonymous

yes, C is correct

24. anonymous

yay!

25. Michele_Laino

yes! it is option C

26. anonymous

The probability that an event will occur is 100%. Which of these best describes the likelihood of the event occurring? Likely Certain Unlikely Impossible

27. imqwerty

total boys = 12 total girls=21 total children =12+21 =33 probability(a boy name is drawn) =total number of favourable events/total no. of events P=12/33 :)

28. anonymous

well, if it 100%, then it would be certain

29. Michele_Laino

100% is the maximum value for a probability

30. HelloKitty17

http://openstudy.com/study#/updates/55ca40bde4b0c5fe980543e9 Come on my question after I need help!!!

31. anonymous

so b?

32. Michele_Laino

yes!

33. imqwerty

:)

34. anonymous

yay!

35. HelloKitty17

People I need our help!! I have been working on an assignment the whole day

36. anonymous

i need more help! im about to get kicked out of my class! ::(

37. anonymous

@Michele_Laino

38. imqwerty

sure event has probability = 1 likely event has probability>=0.5 unliky event has probability<0.5 impossible events have probability=0 so which one is the event given in the question ??

39. anonymous

um, unlikely?

40. Michele_Laino

and 2/3 is greater than 0.5

41. imqwerty

2/3=??

42. anonymous

c?

43. imqwerty

2/3=0.6666.... so which category does it fall into??

44. anonymous

likely

45. anonymous

b

46. Michele_Laino

correct!

47. imqwerty

48. Michele_Laino

it is likely not certain

49. anonymous

)A spinner is divided into sections of equal size, of which some are red, some are blue, and the remaining are green. The probability of the arrow landing on a section colored red is 50%. The probability of the arrow landing on a section colored blue is 10%. What is the probability of the arrow landing on a section colored green? 10% 40% 50% 60%

50. Michele_Laino

the sum of all probabilities has to be equal to 100%

51. anonymous

ok

52. anonymous

40%?

53. Michele_Laino

yes!

54. anonymous

yay!

55. anonymous

)Marcus flipped a coin 800 times and it landed heads up 560 times. What is the relative frequency of the coin landing heads up based on the results of this experiment? 30% 70% 3% 7%

56. anonymous

70%?

57. imqwerty

have u tried these questions ???

58. anonymous

@Michele_Laino

59. imqwerty

yes 70% is correct :)

60. anonymous

yay!

61. anonymous

A bag contains 50 marbles, 10 of which are blue, 8 are red, 20 are green, and 12 are purple. Marcie takes a marble out of the bag, records the color, and returns it to the bag. How many red marbles should she expect after 500 trials? 80 100 120 200

62. anonymous

120?

63. anonymous

@Michele_Laino

64. Michele_Laino

the probability to get a red marble is 8/50

65. Michele_Laino

so the favorable outcomes are, probability times possible outcomes: $\Large \frac{8}{{50}} \cdot 500 = ...?$