Please help I have a test tomorrow and I really need to study the pic is on top

Mathematics

2 answers:

In-s [12.5K]2 years ago

7 0

A. Who has the least amount saved? I think it's the answer

sp2606 [1]2 years ago

3 0

A: Anna has the least amount saved.

b:2,100 is the total amount of every bodies savings put together.

Since you already have 1,575 as info you can use that to divide by 15 because that is her ratio. If you divide it you get 105. You can use that for your other problems.

Anna has 210 dollars in savings. Beth has 315 dollars in savings. And Cynthia has 1,575 dollars in savings.

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(4.1.4) Let X and Y be Bernoulli random variables. Let Z = X + Y. a. Show that if X and Y cannot both be equal to 1, then Z is a

Fynjy0 [20]

Step-by-step explanation:

Given that,

X ~ Bernoulli $(p_x)$ and Y ~ Bernoulli $(y_x)$

X + Y = Z

The possible value for Z are Z = 0 when X = 0 and Y = 0

and Z = 1 when X = 0 and Y = 1 or when X = 1 and Y = 0

If X and Y can not be both equal to 1 , then the probability mass function of the random variable Z takes on the value of 0 for any value of Z other than 0 and 1,

Therefore Z is a Bernoulli random variable

If X and Y can not be both equal to 1

then,

$p_z = P(X=1$ or $Y=1)\\$