# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #1 2023-11-13 19:15:51

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?

Offline

## #2 2023-11-13 20:51:32

Bob
Administrator
Registered: 2010-06-20
Posts: 9,863

### Re: Probability of Die and Coin

correct

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

Offline

## #3 2023-11-14 03:26:13

sologuitar
Member
Registered: 2022-09-19
Posts: 467

### Re: Probability of Die and Coin

Bob wrote:

correct

So, for the probability of AND questions we multiply.

For the probability of OR questions we add.

Offline

## #4 2023-11-14 21:24:16

Bob
Administrator
Registered: 2010-06-20
Posts: 9,863

### 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

Offline

## #5 2023-11-16 18:04:49

sologuitar
Member
Registered: 2022-09-19
Posts: 467

### Re: Probability of Die and Coin

Bob wrote:

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.

Offline

## Board footer

Powered by FluxBB