I did attemp to do 3,4,5 but im still a little confused , Help please!! 1. A fai

Question

I did attemp to do 3,4,5 but im still a little confused , Help please!!

1. A fair coin is flipped four times. Given that the first three flips resulted in heads, what is the probability that the fourth flip also results in heads?

(A) 1/16

(B) 1/8

(C) 1/4 (

D) 1/2 12.

2.A box contains 4 red balls and 6 white balls. You draw three balls in succession, without replacement. If the last two balls are red, what is the probability that the first ball is white? (Note: this problem is a little beyond the book and will be treated as an extra credit problem.)

3. (1 point) Suppose E and F are mutually exclusive events. If Pr(E) = 0.3, Pr(F) = 0.5, then Pr(EUF) =____.

i got .8

4. (1 point) Suppose E and F are independent events. If Pr(E) = 0.3, Pr(F) = 0.5, then Pr(EUF) = ____.

i got .15 or .2 im not really sure

5.Given Pr(E) = 0.6, Pr(F) = 0.4, and Pr(E?F) = 0.3. Find Pr(F|E).

i got 3/4 =.75

Explanation / Answer

1) D 1/2

2) 3/4

3) 0.8

4) 0.65

5) 1/2

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