Question

The weather report says there is a 30%
chance of rain. What is the probability that it
does not rain?

Answer 1

Answer:  70%

Reason:

Subtract the given probability from 100% to get the chance that it doesn't rain. So 100% - 30% = 70%

This is because we have two outcomes: it rains or it doesn't rain.

The probability of each outcome must add to 100%.

Answer 2

Hi!

The probability that it will not rain is 70%.

Probability:

the chance that an event of some sort will happen.

(It is typically measured out of 100%.)

In the given problem, we want to figure out the probability that it will not rain.

So far we know that there is a 30% chance that it will not rain.

Let's think about all the different things that could happen.

1. It does rain
2. It does not rain

There are no other things that could happen, other than it raining or not, because there is no in-between, so those are the only things we have to worry about.

What we know:

There is a 30% chance that it WILL rain.

What we want to find out:

The probability (the chance) that it will NOT rain.

Remember how I mentioned that probability is measured out of 100%? We can use this info.

Let's set up an algebraic equation:

We will use x to represent the probability that it will not rain.

We know that the probability that it will not rain is 30%.

We also know that the probability it WILL rain and the probability that it will NOT rain should add up to 100%.

The equation:

x + 30 = 100

Using algebra, we now simply have to subtract both sides by 30, so we figure out the value of x.

x + 30 - 30 = 100 - 30

Simplifying this, we get:

x = 70

Now, we can plug it back into our original equation to check our work:

70% + 30% = 100%?

100% = 100%

100% does in fact equal 100%, so we are correct.

The probability that it will NOT rain is 70%.

For another probability question, see:

https://brainly.com/question/13038567