A coin is slightly bent, and as a result the probability of a head is 0.52. Suppose that you toss the coin four times. Use the Binomial formula to find the probability of 3 or more heads

Question

amistre64 · Answer

1 - P(0)+P(1)+P(2)

amistre64 · Answer

the Ps in my head are all one term ...  so i spose they should technically be wrapped in ( )

anonymous · Answer

Can anyone help with the binomial question. I think I have the correct answer but need to fully understand

amistre64 · Answer

the hard part is not that hard ... its just using the binomial formula.  What do you have as the binomial formula?

amistre64 · Answer

i spose P(3)+P(4) is simpler to assess, less Ps.  I was thinking this was a lot more trials for some reason

amistre64 · Answer

$$\binom{4}{3}p^3q^1+\binom{4}{4}p^4q^0$$
such that p is a success and q is (1-p), a failure

anonymous · Answer

Yes, that's what i have i ended up with 4/16 which is .25

amistre64 · Answer

rechk your mathing ... 4/3 = 4, and 4/4 = 1 are the most common errors http://www.wolframalpha.com/input/?i=%5Cbinom%7B4%7D%7B3%7D%28.52%29%5E3%281-.52%29%5E1%2B%5Cbinom%7B4%7D%7B4%7D%28.52%29%5E4%281-.52%29%5E0

amistre64 · Answer

that and getting the probabilities mixed up ...