Question

You flip a coin twice. Find the probability that at least one of the tosses showed heads.

Answer 1

ok i typing the choices now

Answer 2

A. 3/4

Answer 3

B. 1/4

Answer 4

Hints:
When the problem is P("at least...")
most of the time you can solve it quickly by 1-P("not even...")
So solving probability of at least once head is the same as solving
1-Prob.(not even one head).

Yes, 3/4 is correct.!

Answer 5

ok well i have one more so plz help me

Answer 6

.
0.560

B.
0.110

C.
0.216

D.
0.440

Answer 7

A. is the first one

Answer 8

I'm gonna say B

Answer 9

Sorry, B is not the one.
When it says P(pink given 30-39) it means P(pink|30-39) which is a conditional probability.
@Imtrying

Answer 10

Conditional probability
P(A given B)=P(A}B)=P(A\(\cap\) B)/P(B)
can you work that out?

Answer 11

* P(A|B) instead of P(A}B)

Answer 12

oh so d

Answer 13

Yes, well done!

Answer 14

im thinking that because i actually rolled the dice and did it

Answer 15

That great! It's called a random experiment!

Answer 16

But you cannot do that for the second question! :(

Answer 17

well i have 15 more but ill let u go but thxs

Answer 18

You were alot of help!

Answer 19

You're welcome!
Try them by yourself, I think you can handle them!

Answer 20

ok

Answer 21

Bye!