Q: What is the missing number in 25 18 22 27 the average in 22?

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22

The average is 23.

Average = sum(X)/n = 60/3 = 20

Since there is an even number of them, the median is the mean average of the middle two, namely [ 22 + 24 ] /2 = 23

94

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The average of 18 and 22 is 18+22/2 = 20

22

The average is 22.

2:18-2:22

19.75 is the average.

The average is 23.

Average = sum(X)/n = 60/3 = 20

Argon has 18 protons, 22 neutrons, and 18 electrons.

Since there is an even number of them, the median is the mean average of the middle two, namely [ 22 + 24 ] /2 = 23

94

The atomic number of argon (Z) is 18, which means it has 18 protons. The mass number (A) is 40, so subtracting the atomic number from the mass number gives you the number of neutrons. In this case, 40 - 18 = 22 neutrons.

18.