A weighted average is a more accurate measurement of scores or investments that are of relative importance to each other. This is often the case with investment portfolios, grade scoring and other statistics.You can find out how to calculate weighted averages.ultiply each number by its weight. 1  You can choose to write this at the end of the chart or to do it on 1 line, in a formula. 2  For example, if you are trying to figure out the weighted average of certain grades, you might write 0.9(0.25) to indicate a 90 percent grade times 25 percent of the total grade.
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There are 3 basic parts of the brain, the cerebrum, the cerebellum, and the brain stem.   The brain is made of different types of nerve cells.It has a jelly-like consisten â¦ cy and is about the size of a melon. The brain cells use electricity and chemicals to pass messages throughout the brain and up and down the spinal cord to the rest of the body.onfidence votes 5.8K. The human brain contains many tissue types however only about 10% of the cells are actually neurones the rest is made up of blood vessels and by far the most cells are glial cells (oligodendrocytes etc).