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3 years ago

A number is chosen at random from the set of numbers (21,22,23,.......34,35) what is the probability that it is

1 answer:

5 0

In cases like this, the probability of a certain event is given by the ratio between the positive outcomes, and all positive outcomes. There are $35-21+1 = 15$ numbers in your set. The positive outcomes depend on the request:

There are three multples of four, namely 24,28 and 32. So, the probability of choosing one of them is $\frac{3}{15}=\frac{1}{5}$

There are three prime numbers, namely 23,29 and 31. So, the probability of choosing one of them is $\frac{3}{15}=\frac{1}{5}$

The number 18 doesn't belong to the set, so you can't possibly choose it. In other words, there are zero positive outcomes, so the ratio becomes $\frac{0}{15} = 0$

All of the numbers in the set are whole number, so you are certain that you will chose a whole number. In other words, all 15 possible outcomes are positive outcomes, so the ratio becomes $\frac{15}{15} = 1$

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3 years ago

I made 12 dog treats using 1 cup of peanut butter. If I want to make 36 dog treats, how much peanut butter will I need? Write a

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Answer:

You will need 3 cups peanut butter to make 36 dogs treats.

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Step-by-step explanation:

12 dog treats = 1 cup

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3 years ago

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mel-nik [20]

Answer:

$9$

Step-by-step explanation:

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3 years ago

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2 years ago

Read 2 more answers