jamiesmith:

Use a tree diagram to explain why the probability that a

5 months ago
Vocaloid:

|dw:1532142607589:dw|

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

|dw:1532143020001:dw| 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

5 months ago
Vocaloid:

sure

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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 = ?

5 months ago
lannasum:

@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

5 months ago
Vocaloid:

good

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

you had D marked as your solution

5 months ago
jamiesmith:

oh wait I put d

5 months ago
Vocaloid:

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

5 months ago
jamiesmith:

yup

5 months ago
Vocaloid:

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

5 months ago
jamiesmith:

so simplify it making it 1/6

5 months ago
Vocaloid:

1 - 6/36 is 30/36 not 1/6 or in other words, 5/6

5 months ago
Vocaloid:

16 is good but make sure to put a fraction symbol between the numerator and denominator 646,645/646,646

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

what

5 months ago
Vocaloid:

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.

5 months ago
Vocaloid:

646,645/646,646

5 months ago
Vocaloid:

the fraction bar comes after the first six digits

5 months ago
Vocaloid:

yup good

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago
Vocaloid:

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

5 months ago