Question

MEDAL FOR BEST ANSWER

A six-sided number cube is rolled. Find the probability of rolling a 3 or a number greater than 4.

A. 1/18


B. 2/3


C. 1/6


D. 1/2

Answer 1

Ok. So you roll a number cube with 6 different possible outcomes.
1
2
3
4
5
6
We want to know what the probability is of rolling a prime number or a number greater than 4. To do this, find the probability of each, and then add them.

Answer 2

Okay, so the prime numbers between 1 and 6 are 2,3, and 5. So there are 3 prime numbers. The chance of rolling a prime number is 3 out of 6, or 1/2.

And the numbers greater than 4 are 5 and 6 (4 isn't greater than 4). So there are 2 numbers greater than 4. The chance of rolling a number greater than 4 is 2 out of 6, or 1/3.

Answer 3

So add 1/2 and 1/3.
1/2+1/3
3/6+2/6=5/6.

So the chance of rolling a prime number or a number greater than 4 is 5/6. But each probability has 5 as a possibility, so subtract 1/6.
5/6-1/6=4/6 or 2/3.

Answer 4

Thank you very much!!

Answer 5

np hmu for more help