K=4(5)
k=20
you just plug in 5 for d and multiply normally from there.
Note that the chances of a head and a tail appear in a single toss is 1/2
(1/2)^3 =0.125
x%*120=36
x/100 *120=36
120x/100=36
120x=3600 <em>/:120</em>
<em>x=30</em>
<em>⇒36 is 30% of 120 </em>
<em />
Around 15.085, which is the cube root of 3433
