Question

I need help in probabilities

There are 36 jolly hobbits, 15 grumpy hobbits, 11 jolly leprechauns and 12 grumpy leprechauns. Find the probability that person randomly selected is jolly or a leprechaun

Answer 1

What do you think you will do first?

Answer 2

@Aethelswith Please do not give out direct answers.

Answer 3

since it says that is jolly or a leprechaun i have 36 jolly hobbits, 11 jolly leprechauns and 12 grumpy leprechauns and i don't how to work the formula with 3 events @sleepyjess

Answer 4

First you need to add up all of the hobbits and leprechauns.

Answer 5

74 that wil be the total and wait if I'm right then i need the total of the jolly and leprechauns that will be 59 so it will be 59/74 = 0.747? (the answer need to be in decimals) @sleepyjess

Answer 6

Find the probability that person randomly selected is jolly or a leprechaun = jolly+leprechaun/total

Answer 7

it's 59/74 = 0.747 cause i have 36 jolly hobbits, 11 jolly leprechauns and 12 grumpy leprechauns @sleepyjess

Answer 8

Ok, so you need it in decimal form? Or percent?

Answer 9

decimal so that will be the answer can you help with another one

if two household are independently selected, what is the probability that both have income in the $30,000- $39,999 range?

Income
0- $9,999 6%
$10,000-$19,999 9%
$20,000- 29,999 13%
$30,000-$39,999 28%
$40,000-$49,999 18%
$50,000-$59,999 17%
$60,000 or more 9%

when they give the chart i get confuse @sleepyjess

Answer 10

Hmmmm... I'm not sure how to do this one but let me see if I can find anything.