Posted by **Joanne** on Thursday, February 7, 2008 at 5:43pm.

If you toss a coin, the probability of gettig heads is 1/2. If you toss a coin 2 times. the probability of getting heds each time is 1/2*1/2 or (1/2)^2.

-Write an expression to represent the probability of tossing a coin 'n' times and getting 'n' heads.

-Express your answer to the question above as a power of 2.

At first I thought the expression was (1/2)^n but then when I look at it again, it seems wrong.

- algebra I -
**DanH**, Thursday, February 7, 2008 at 5:59pm
It is right!!

- algebra I -
**Joanne**, Thursday, February 7, 2008 at 6:17pm
Oh okay. Then for the second problem, would it be (1/2)^2?

- algebra I -
**DanH**, Thursday, February 7, 2008 at 6:46pm
I am sorry, but the second part of the problem "express your answer to the question as power of 2" is confusing to me. Certainly, if you flip the coin TWICE, then it's a power of 2, as you said, but if you flip it N times, I don't know you can express this as a power of 2.

- algebra I -
**Joanne**, Thursday, February 7, 2008 at 6:56pm
they mean that n= n number of times in the equations

(1/2)^n

but the product is not corresct if u replce an exponent of 2 for the n...

the answer is said to be 2^-n

- algebra I -
**DanH**, Thursday, February 7, 2008 at 7:12pm
Oh...ok, of course...

2^-n is the same as (1/2)^n.

## Answer This Question

## Related Questions

- probability - Adefective coin minting machineproducescoinswhoseprobability ...
- math - a fair coin is tossed in the air 4 times. if the coin lands heads up the ...
- Stat. - A trick coin has been weighted so that heads occurs with a probability ...
- math - In a game, a player tosses a coin 4 times. If the player gets 3 or 4 ...
- algebra - A coin is tossed 3 times. Find the probability of obtaining the ...
- Probability - You toss a fair coin four times. Find the probability of no more ...
- finite math (probability - suppose you toss a coin 100 times and get 57 heads ...
- science - If you toss a coin five times and it lands heads up each time, can you...
- Probability - Consider 10 independent tosses of a biased coin with the ...
- math - Suppose you have an extremely unfair coin: the probability of a head is 1...

More Related Questions