Weighted Average Calculation - Weighted Average Online Calculator - How to Calculate Weighted Average - Stock Weight Calculation

<p align="left">What is a weighted average? Tr    For example, here is the test score of a classmate of a classmate:<br/>    Usually test 80, mid 90, end 95     The school's prescribed subject scores are calculated as:<br/>    Usually test 20%;<br/>     Mid-term grades account for 30%;<br/>     Final grades account for 50%;<br/>     Tr     Here, the proportion of each achievement is called the weight or weight. Then,<br/>    Weighted average = 8020% + 9030% + 95*50% = 90.5<br/>     Average of arithmetic = (80 + 90 + 95) / 3 = 88.3<br/>     The above example is the case of known weights. The following example is the case of unknown weights:<br/>     Stock A, 1000 shares, price 10;<br/>     Stock B, 2000 shares, price 15;<br/>     Arithmetic mean = (10 + 15) / 2 = 12.5;<br/>     Weighted average = (10 x 1000 + 15 x 2000) / (1000 + 2000) = 13.33      In fact, in the case where the weights of each number are the same, the weighted average is equal to the arithmetic mean. Tr    Hint: The Dow Jones Industrial Average is the arithmetic mean, and the S&P 500 is the weighted average. </p>