Answer:
Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Friedrich Mohs in 1822 is used to determine mineral hardness.
Considering the given discrete probability distribution, it is found that there is a 0.36 = 36% probability that Hugo buys fewer than 3 packs.
<h3>What is the discrete probability distribution?</h3>
Researching on the internet, it is found that the discrete probability distribution for the number of packs that Hugo buys is given by:
The probability that he buys fewer than 3 packs is given by:
P(X < 3) = P(X = 1) + P(X = 2).
Hence:
P(X < 3) = P(X = 1) + P(X = 2) = 0.2 + 0.16 = 0.36.
There is a 0.36 = 36% probability that Hugo buys fewer than 3 packs.
More can be learned about discrete probability distributions at brainly.com/question/24855677
Answer:
In order to use all the paint in a paint mixture in the same ratio of 1:5, the painter needs 2.4 ounces of paint thinner
Explanation:
The given parameters are;
The number of parts of thinner used to create 5 parts of paint mixture = 1 part
The amount of paint the painter has = 12 ounces
The amount of thinner is given by the relation;
Ratio of thinner to paint mixture = 1:5
Which gives, 1 part of thinner is required for 5 parts of paint mixture
1/5 parts of thinner is required for 1 part of paint mixture
Therefore, 12/5 or 2.4 parts of thinner will be required for 12 parts of paint mixture
Which gives;
2.4 ounces of thinner will be required for 12 ounces of paint mixture
Therefore, in order to use all the paint in a paint mixture in the same ratio of 1:5, the painter needs 2.4 ounces of thinner.
