Question

You roll a pair of dice. What is the probability that both dice will show prime numbers

Answer 1

Look at this sample space for the 36 possible outcomes of a pair of dice toss.
Count the instances of both die showing a prime number. The probability is that number divided by 36. @CharleeAnne

Answer 2

Note: 1 is NOT a prime number.

Answer 3

ok, thank you

Answer 4

So, what did you get for the answer?

Answer 5

i got 4/9

Answer 6

How many ordered pairs of primes did you count?
I'm thinking you may have counted 16 pairs which is not correct.
I counted only 6 but I may need to count again.
Remember that both numbers have to be prime so a result such as (2,4) would not be counted.

Answer 7

im actually really confused by using this chart i dont really understand how to use it

Answer 8

When you toss 1 die, there are six possible outcomes.
When you toss the second die, there are six possible outcomes.
6*6 = 36 are there are 36 possible outcomes for tossing a pair of dice.

Answer 9

i got that but i dont understand what i should do after that

Answer 10

Of these 36 possibilities, you want those with prime numbers on both die.

I think I have 9 circled. See what you think. Click on the attachment.

Answer 11

So, the probability would be 9/36 where 9 is the number of successful outcomes and 36 is the number of possible outcomes. By success, it is meant whatever was a desired outcome, in this case, (prime, prime).

Answer 12

i thought 2 wasn't a prime number

Answer 13

The number 1 is not a prime number.

2 is the only even prime number.

A prime number has exactly two positive factors, itself and 1.

Answer 14

oh ok

Answer 15

Here are the beginning prime numbers. There are infinitely many.