A couple decides to keep having children until they have a boy, at which point they will stop having children. They also agree to having a maximum of three children. The table below shows the probability distribution of
X = the number of children such a couple would have.
X = # of children
1
2
3
P(X)
1
2
1
4
1
4
On average, how many children would such a couple have?
E(X) =
children

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet

3/8