## bookaholic 2 years ago Suppose x coins are tossed. Write an expression to represent the number of possible outcomes. A. 2^X B. X+X C. X*X D. 2X

1. andriod09

2. bookaholic

There are 2 sides to a coin

3. andriod09

>.< besides that. i mean what do you know about probability?

4. bookaholic

I know the probability of a coin landing on heads is 1/2 the same for tails

5. bookaholic

and I know every time you add a coin the chance that there will only be one heads halves

6. andriod09

7. bookaholic

8. bookaholic

not probability

9. andriod09

-_- >.< their the same region of math. >_<

10. bookaholic

They might be the same region but even in the same region you can get very different answers like when using sin cos and tan

11. bookaholic

Im confused here

12. andriod09

13. bookaholic

thats not one of the answers available

14. kropot72

|dw:1360002853031:dw| The diagram shows the outcomes of tossing 1 coin, 2 coins and 3 coins. There are 2 outcomes for 1 coin, 4 outcomes for 2 coins and 8 outcomes for 3 coins. Can you make the correct choice of expression now?

15. bookaholic

um maybe

16. kropot72

Try substituting in each of the choices for 3 coins and see which gives the correct number of possible outcomes. For example choice B: x + x = 3 + 3 = 6 Therefore choice B is incorrect.

17. kropot72

@bookaholic Have you tried another substitution?

18. kropot72

@bookaholic Are you there?

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