# Probability

• Dec 10th 2013, 05:01 PM
leibnitz
Probability
Pls Fans i need ur help in this mathematical problem.............A number is chosen at random from the number 1 to 30 inclusive.What is the probability that the number will be divisible by 5?
THANKS FOR UR AID
• Dec 10th 2013, 05:16 PM
romsek
Re: Probability
what's the probability of picking any number?

how many ways can you pick a number divisible by 5

multiply
• Dec 10th 2013, 05:24 PM
Plato
Re: Probability
Quote:

Originally Posted by leibnitz
Pls Fans i need ur help in this mathematical problem.............A number is chosen at random from the number 1 to 30 inclusive.What is the probability that the number will be divisible by 5?

Here is a vocabulary lesson.
If one says "integers from one to thirty" means $\displaystyle 1\le n\le 30$.
If one says "integers between one to thirty" means $\displaystyle 1< n< 30$.

Now to answer question is: $\displaystyle \frac{{\left\lfloor {\frac{{30}}{5}} \right\rfloor }}{{30}} = \frac{1}{5}$