# math probability-PLEASE HELP -thanks

posted by
**B6** on
.

thanks for helping me!

You spin the spinner twice. draw a tree diagram and list sample spaces to show the possible outcomes. From that answer questions 1,2 and 3.

The spinner is 4 equal parts for a, b, c ,d

I know the tree diagram- you Have a,b,c,d, and from each of those letters ex. A has four lines so a,b,c,d comes off of the a. do this for each.

sample space:

aa ca

ab cb

ac cc

ad cd

ba da

bb db

bc dc

bd dd

the question I need help on is:

1. P(vowel, b or d)=

I got 1/8 by mult. 1/4*8/16=4/32=1/8

Is this correct?

2. p(a,c)=1/16 which I know is correct

3.P(same letter)=4/16=1/4, which I know is correct

Is the first part correct?

thanks for your help.

Sorry the question was so long