## Jovanmommy_13 2 years ago The bar representing which of the following probabilities on a histogram would be the highest? A.1/30 B.1/15 C.1/10 D.2/15 help asap !! please

1. jim_thompson5910

convert each fraction to a decimal number and that will allow you to compare the numbers easier

2. jim_thompson5910

for example 1/30 = 0.0333333... 1/15 = 0.0666667 So we can see that 1/15 is larger than 1/30 since 0.0666667 is larger than 0.033333

3. Jovanmommy_13

so it would be b?

4. jim_thompson5910

if you just had those two fractions, yes but you need to compare the rest of the fractions

5. Jovanmommy_13

c is 0.1 and d is 0.13 so than it would be d than?

6. jim_thompson5910

correct

7. Jovanmommy_13

oh okay thank you,

8. jim_thompson5910

you're welcome

9. Jovanmommy_13

10. jim_thompson5910

that's the combination of choosing 7 things out of 9 basically it's asking "how many ways are there to choose 7 items out of 9 where order does not matter"

11. Jovanmommy_13

I don't understand, cause the choices are A.66 B.55 C.36 D.45

12. jim_thompson5910

13. Jovanmommy_13

no , this is online math,

14. jim_thompson5910

I figured that, but I would have also figured that you have learned about permutations or combinations by now

15. jim_thompson5910

seems odd how they skipped over that

16. Jovanmommy_13

No, it was never on any of the information given to me for each section,

17. jim_thompson5910

well luckily we can take advantage of the fact that 9 C 7 = 9 C 2 9 C 2 = (9*8)/2 = ???

18. Jovanmommy_13

36

19. jim_thompson5910

so 9 C 7 = 36 as well

20. jim_thompson5910

you can also use Pascals triangle to get the same thing

21. Jovanmommy_13

what about this? If a probability distribution is 5/12,1/6 ,1/4 , x, what is the value of x? A.1/3 B.1/6 C.1/12 D.1/4

22. jim_thompson5910

add up all the fractions including x and set it equal to 1 then solve for x

23. jim_thompson5910

5/12 + 1/6 + 1/4 + x = 1 solve this for x

24. Jovanmommy_13

i don't know, 7/22?

25. jim_thompson5910

no

26. jim_thompson5910

oh wait, one sec

27. Jovanmommy_13

28. Jovanmommy_13

understand*

29. jim_thompson5910

what do you get when you combine these fractions 5/12 + 1/6 + 1/4

30. Jovanmommy_13

i don't know , cause they have different numbers do i need them both to get 12?

31. jim_thompson5910

yes you need all the denominators to be equal to 12

32. Jovanmommy_13

12/12?

33. Jovanmommy_13

you multiply 6 with 2 and 4 with 3 ,

34. jim_thompson5910

5/12 = 5/12 1/6 = 2/12 1/4 = 3/12 ----------------- 5/12 + 1/6 + 1/4 is the same as 5/12 + 2/12 + 3/12

35. Jovanmommy_13

10/12 reduced to 5/6?

36. jim_thompson5910

good

37. Jovanmommy_13

thaat not right

38. jim_thompson5910

we're not done yet

39. Jovanmommy_13

oh

40. jim_thompson5910

but we're on the right path to getting there

41. Jovanmommy_13

okay whats next?

42. jim_thompson5910

5/12 + 1/6 + 1/4 + x = 1 is the same as 5/6 + x = 1 Now subtract 5/6 from both sides to isolate x 5/6 + x - 5/6 = 1 - 5/6 x = 1 - 5/6 x = ???

43. Jovanmommy_13

4/6 reduced to 2/3? but that not on there either?

44. Jovanmommy_13

nevermind 0.16666666666

45. jim_thompson5910

no not this |dw:1359342264313:dw| but this |dw:1359342279294:dw|

46. Jovanmommy_13

so it be 1/5?

47. Jovanmommy_13

1/6*

48. jim_thompson5910

1/6 yep

49. Jovanmommy_13

Is it okay if i just message you and you help me please?

50. jim_thompson5910

sure, but I don't want to do every problem for you just letting you know