Mathematics, 01.02.2021 15:20 ChocCole

NEED HELP ASAP!! In a group of 20 batteries, 3 are dead. You choose 2 batteries at random.
a) Create a probability model for the number of good batteries you get.
b) What's the expected number of good ones you get?
c) What's the standard deviation?

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 15:30, babas97

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Answers: 2

continue

Mathematics, 21.06.2019 18:30, rheamskeorsey33

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

Answers: 1

continue

Mathematics, 21.06.2019 19:00, daisyperez1

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

Answers: 1

continue

Mathematics, 21.06.2019 19:30, janetexcoelho

Find the distance between (0,5) & (-4,2)

Answers: 1

continue

You know the right answer?

NEED HELP ASAP!! In a group of 20 batteries, 3 are dead. You choose 2 batteries at random.
a)...