In a class of p students, the average ( arithmetic mean) of the test scores is 70. In another class of n student, the average of the scores for the same test is 92.
When the scores of the two classes are combined, the average of the test scores is 86.
What is the value of P/N?

hi,

3. 12.15, you are correct.

4.2.01, your first digit is correct,

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this is a very good question

step-by-step explanation:

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the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

look at the picture i have filled out a table for it. hope this .