Question

http://prntscr.com/109aiy

Answer 1

But if A represents P(event A) and similarly for B,

you have (1/2 * 1/2 + 1/2 * 1/2)^2 = (1/4 + 1/4)^2 = (1/2)^2 = 1/4





1/2p(A) + 1/2(p(B)) = (1/2*1/2 + 1/2*1/2) = .25 + .25 = .5



For part (b):

Roll one of the cubes.

The top facing number will be

either from {1 5 6} or {2 3 4} - it doesn't matter which.

Then you want the other one to have its top face come from the other trio of numbers,

so P(success) = 3/6 = 1/2

Answer 2

i got the part (a) of the answer wrong can you help

Answer 3

(1/2A + 1/2B)^2 = (1/2A)^2 + 2*(1/2A)*(1/2B) + (1/2B)^2

(1/2A + 1/2B)^2 = (1/4)A^2 + (1/2)AB + (1/4)B^2

Answer 4

means?

Answer 5

it means (1/2A + 1/2B)^2 simplifies to (1/4)A^2 + (1/2)AB + (1/4)B^2

Answer 6

The probability of event A or event B happening is

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 1/2 + 1/2 - (1/2*1/2)

P(A or B) = 1/2 + 1/2 - 1/4

P(A or B) = 3/4

Answer 7

YOU MEAN to say this will be answer for part a

Answer 8

@LilySwan Try posting your question in this thread.

Answer 9

@Directrix