Question

Use a tree diagram to explain why the probability that a

Answer 1

then you'd circle all the branches that have exactly 2 girls and 2 boys, since they state the probability is 3/8 then there should be 6 of these branches out of the 16 total branches

Answer 2

like, see how this branch has 2 M's and 2 F's? you would circle all branches that have 2 M's and 2 F's representing 2 boys and 2 girls

Answer 3

sure

Answer 4

if it's like a pdf or word document you can use the attach file button

Answer 5

it says unit test - does your teacher allow collaboration on this assignment?

Answer 6

alright cool give me a few minutes to check over the assignment

Answer 7

hm, check #6 again

"tossing exactly 2 tails"

there are three ways this can happen

TTH
THT
HTT

so 3 outcomes/the total # of outcomes for flipping 3 coins = ?

Answer 8

@vocaloid im actually have the same problem and im wondering if you can make the diagram for me as well as i am having troubles constructing it

Answer 9

good

Answer 10

for #12

55% were born in canada, 85% speak english at home
which means 15% do not speak english at home

so 0.55 * 0.15 is the first part of the solution so C can be the only viable sol'n

Answer 11

you had D marked as your solution

Answer 12

oh wait I put d

Answer 13

for 14a) do you see how on the table there are 36 outcomes and 6 outcomes that have a sum less than 5? so 6 outcomes/36 total outcomes

Answer 14

yup

Answer 15

14b) is mathematically correct but you should simplify 1 - 6/36

Answer 16

so simplify it making it 1/6

Answer 17

1 - 6/36 is 30/36 not 1/6

or in other words, 5/6

Answer 18

16 is good but make sure to put a fraction symbol between the numerator and denominator

646,645/646,646

Answer 19

17) they want to know if there is any possibility of the predictions being correct. there are only three outcomes (winning, losing, or tying) so you must see if the predicted outcomes add up to 1 or not, to see if his predictions could possibly be valid

Answer 20

what

Answer 21

there are three possible outcomes

winning
losing
tying

he has made predictions for the outcomes of all three events. they must add up to 1 for his prediction to be valid. see if the three probabilities sum up to 1.

Answer 22

646,645/646,646

Answer 23

the fraction bar comes after the first six digits

Answer 24

yup good

Answer 25

you need to add the three fractions and see if the result is 1 or not

Answer 26

his predictions:

winning = 2/9
tying = 1/2
losing = 2/5

you just need to add 2/9 + 1/2 + 2/5 and see if it equals 1 or not

Answer 27

check your calculations again

2/9 + 1/2 + 2/5 = 101/90 making the coach's predictions invalid

Answer 28

alright

for 18

"probability of getting out of jail without paying a fine" is essentially "probability of rolling doubles at least once in three attempts"

we can find this by calculating the opposite probability (probability of not rolling doubles three times in a row) and doing 1 minus that probability

Answer 29

there are 6 ways out of 36 ways to roll doubles, or 1/6 to simplify

the probability of ~not~ rolling doubles is therefore 1 - 1/6 or 5/6

not rolling doubles three times in a row: (5/6)(5/6)(5/6)

1 minus that probability = 1 - (5/6)(5/6)(5/6) ----> simplify this to get the sol'n

Answer 30

for #21 you can't just draw the tree, you also need to show why the probability of getting 2 girls 2 boys is 3/8

as stated before, there are 16 possible outcomes, you must show that 6 out of those 16 outcomes involve 2 girls and 2 boys

Answer 31

yes, mark or circle all the branches with exactly 2 boys 2 girls

Answer 32

alright cool everything else should be ok to the best of my knowledge

Answer 33

uh

well there's a "best response" button, you can click that if you'd like