Events d and e are independent, with p(d)- 0.6 and p(d and e) - 0.18. which of the following is true? a. p(e)- 0.12 b. p(e) = 0.4 c. p(d or e)-0.28 d. p(d or e) 0.72 e. p(d or e)-0.9 16, mr. steckler travels through two intersections with traffic lights as he drives to the mercado. the traffic lights operate independently. the probability that both lights will be red when he reaches them is 0.22 the probability that the first light will be red and the second light will not be red is 0.33. what is the probability that the second light will be red when he reaches it? a. 0.40 b, 0.45 c. 0.50 d. 0.55 e. 0.60

Step-by-step explanation:

Given that Events D and E are independent, with P(D)- 0.6 and P(D and E) - 0.18.

P(D and E) = P(D)*P(E) (since independent)

Or P(E) = 0.3

Using this we find

P(Dor E) =

QNo2

Since lights are independent

P(Both) = P(A) *P(B) =0.22 where A I light on and B second light on

P(AB') = P(A) P(B') = 0.33

When we add we get P(A) = 0.55

P(B) =

the probability that the second light will be red when he reaches it

= P(B) = 0.60

Probabilities are used to determine the chances of an event.

(a) Events D and E

The given parameters are:

Since the events are independent, then:

Substitute known values

Divide both sides by 0.6

Rewrite as:

Also:

Substitute known values

So, the true statement is:

(b) Traffic lights

Let A and B represent the lights being red

The given parameters are:

Add both equations

Rewrite as:

Express as

Factor out P(A)

Opposite probabilities add up to 1

Recall that:

So, we have:

Substitute

Divide both sides by 0.55

Hence, the probability that the second light will be red when he reaches it is 0.40

Read more about probabilities at:

link

whats the

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500