Question

Hello anybody there? Could someone please check my answers? Only 2 questions. Really quick and easy! I promise! I'll give a medal to whoever answers first!

1. Which pair of events are complementary events?

rolling a 1 with a die; rolling a 2 or greater with a die

rolling a 4 or greater with a die; rolling a 5 or less with a die

I think it's this one-->rolling a number less than 3 with a die; rolling a number greater than 3 with a die

rolling a 5 with a die; rolling a 2 or greater with a die

2. Which experiment describes a binomial experiment?

Select 10 cards from a deck of cards, with replacement, and record which cards are selected.

Select 10 cards from a deck of cards, without replacement, and record which cards are selected.

I think it's this one-->Select 10 apples from a truckload of apples, with replacement, and record whether the apple is ripe.

Select 10 apples from a truckload of apples, without replacement, and record whether the apple is ripe.

Answer 1

Am I right?

Answer 2

I'm not quite sure on both the first and second whether they're A or C.

Answer 3

1.I think its rolling a 1 with a die, rolling a 2 or greater with a die

though i'm not exactly sure what you mean by complementary in this context

Answer 4

does it mean that neither of the 2 events can possibly read to the same result?

Answer 5

- like for example for the second pair of events you could throw a 4 on each event

Answer 6

I agree that the first problem's answer is rolling a 1 with a die, rolling a 2 or greater with a die. They are complementary in that the probabilities of the two separate events add up exactly to 1.

Answer 7

I agree that Select 10 apples with replacement is a binomial trial. There are two outcomes, and the probability of a given outcome is exactly the same each time.