Question

You toss five fair coins. The probability that all five coins land heads is ______??

Answer 1

Assuming the coins are truly fair, the probability of getting 5 heads on all 5 coins are 1/2^5

Answer 2

I just figured it out, thank you

Answer 3

think of it like you have a 50% chance of having 1 coin land on heads so multiply 1/2 5 times.

Answer 4

could you help me with another?

Answer 5

sure, throw em at me =)

Answer 6

Two six-sided fair dice are rolled simultaneously.
The probability that the sum of the two numbers rolled is greater than 3, given that the sum of the numbers is not greater than 5, is _______. The probability that one of the numbers is a 6 and the sum of the two numbers is an odd number is _______.

Answer 7

ok for this question you want to list out all the possibilities of the dice. Do you know how many possibilities there are?

Answer 8

36 possibilities

Answer 9

close, but not correct. unless order doesn't matter and you can count repeated ones as another possibility as well.

Answer 10

6*6 is 36 though so wouldnt that be how many possibilities there are?

Answer 11

if you do not count any repeats, it's not 36, it would be 6+5+4+3+2+1 which is 21.

Answer 12

oh okay whats the next step?

Answer 13

the next step would be to get the sum of each and every single result and circle the ones that match your question and divide that by the total amount of possibilities which is 21.

Answer 14

im really confused

Answer 15

i wrote out the possiblities, i got 4 possibilities that in which the sum is greater than 3 but not greater than 5. so that would be 4/21? here are the answer choices for that one 3/10, 7/10, 3/4, 5/6, 9/10

Answer 16

sorry don't mind me, i was a bit confused there as well.

Answer 17

Yes and the possibilities I got were 1&3, 1&4, 2&2, 2&3 theres only 4?

Answer 18

ok, lets try 36?

Answer 19

4/36=1/9 still doesnt fit the answer choices :( ----> 3/10, 7/10, 3/4, 5/6, 9/10

Answer 20

no no, there will be more then. since we get repeats.

Answer 21

okay so i count the repeats?

Answer 22

mhm

Answer 23

then i get 7/36 which cant be reduced? and its not an answer choice

Answer 24

9/36 would be 1/4 which still isnt an answer choice?

Answer 25

wops, cross-eyed again

Answer 26

I'm really not sure then. I hope your teacher or someone else can explain this question a lot better.

Answer 27

Well its an online credit recovery class this is the last question :/

Answer 28

do the 2nd part first.

Answer 29

i already got the 2nd part its 1/12

Answer 30

the first part is a headache.

Answer 31

yup ima just guess hopefully i pass

Answer 32

ok good luck =)