Question

when flipping 4 coins, what is the probability of "more heads than tails"?

Answer 1

satellite73 help me after this one

Answer 2

that means either 3 heads and one tail or 4 heads
the probability of all the possibilities can be seen by looking at the fourth row of pascal's triangle
\[1,4,6,4,1\]
the denominator of each of the probabilities is \(2^4=16\)
so the probabilities are
\[\frac{1}{16}, \frac{4}{16},\frac{6}{16},\frac{4}{16}, \frac{1}{16}\] for
no heads, one head, two heads, three heads, four heads respectively

Answer 3

more heads than tails means add up the last two, i.e.
\[\frac{4}{16}+\frac{1}{16}\]

Answer 4

ok i get it now, thx!

Answer 5

yw