Lara makes the following statement:
"There is an 80% chance of rain tomorrow and a 10% chance I will go to the park."
What is the chance that it will rain tomorrow and Lara will go to the park?
90%
70%
8%
6%

- anonymous

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- jim_thompson5910

A = it rains tomorrow
B = you go to the park
P(A and B) = P(A) * P(B) only if the two events are independent

- anonymous

do you know the answer

- jim_thompson5910

yeah just multiply the probabilities

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## More answers

- anonymous

whats that

- jim_thompson5910

the 80% and 10%

- anonymous

it gives me 800

- anonymous

hello

- jim_thompson5910

you should do 0.8 times 0.1

- jim_thompson5910

80% = 0.8
10% = 0.1

- anonymous

ok thanks can you help me with some more

- jim_thompson5910

sure, one more

- anonymous

The table below shows the number of marbles of different colors in a bag:
Color of Marbles Number of Marbles
Pink 5
Blue 2
Green 3
Ursula draws a marble from the bag randomly without looking. She then draws another marble from the bag without replacing the first one. Which expression shows the probability of drawing green marbles in both the trials?

- jim_thompson5910

show me what you have so far

- anonymous

what do you mean

- anonymous

i can show you the answers

- jim_thompson5910

I want to see how far you got

- anonymous

i didnt try it yet

- jim_thompson5910

give it a try

- anonymous

ill give you a metal or 2

- anonymous

hello

- anonymous

jim

- jim_thompson5910

what is the probability of drawing 1 green marble?

- jim_thompson5910

hint: look at the number of green and the number total

- anonymous

wat

- jim_thompson5910

how many green marbles are there

- anonymous

3

- jim_thompson5910

out of how many total?

- anonymous

10

- jim_thompson5910

so the probability of getting green is 3/10
that's the first draw

- jim_thompson5910

on the second draw, we do NOT replace the marble
so we have 2 green out of 9 total
the probability of getting another green on the second draw is 2/9

- jim_thompson5910

multiply 3/10 and 2/9 to get your answer

- jim_thompson5910

reduce the answer as much as possible

- anonymous

times or addition

- jim_thompson5910

multiply means times

- anonymous

i know i didnt read it properly

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