Math Is Fun Forum

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Probability of Die and Coin

A die is rolled and then a coin is tossed. What is the probability that the die shows an even number AND the coin shows a tail?

Let me see.

Probability questions are a bit fuzzy.
A die has digits 1 to 6. I know that 3/6 or 1/2  are even numbers.

P(even an even number) = 3/6 = 1/2.

P(coin shows a tail) = 1/2

P(even number AND tail) = (1/2)(1/2) or 1/4.

You say?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Probability of Die and Coin

correct

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Re: Probability of Die and Coin

correct

So, for the probability of AND questions we multiply.

For the probability of OR questions we add.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Probability of Die and Coin

That sounds about right.

B

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

sologuitar

Member

Registered: 2022-09-19

Posts: 467

Re: Probability of Die and Coin

That sounds about right.

B

I hope to find the needed time in the near future to do an extensive self-study of probability. I find probability to be interestingly challenging.