A coin, having probability p of landing heads, is continually flipped until at least one head and one tail have been flipped. (a) What is the probability that stop at the fifth flip? (b)Find the expected number of flips needed.

2^y = ln 5, or   y(ln 2) = ln 5.   solving for y,   y = (ln 5) / (ln 2).   y=5

step-by-step explanation:

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

i dont know

step-by-step explanation:

step-by-step explanation:

consider the parallelogram shown in the attached image.

in the parallelogram hijk, the length of hk is given as,

from the properties of parallelogram we know that the opposite sides of a parallelogram are parallel to each other and are equal in measure.

therefore, the length of the side ij must be equal to the length of the side hk and that is .

hence, the expression for the length of ij confirms that hijk is a parallelogram.