What is the weighted mean of the scores 80, 90, and 70 with weights 1, 2, and 1

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Question: What is the weighted mean of the scores 80, 90, and 70 with weights 1, 2, and 1 respectively?

Options:

Correct Answer: 85

Solution:

Weighted mean = (80*1 + 90*2 + 70*1) / (1 + 2 + 1) = 85.

What is the weighted mean of the scores 80, 90, and 70 with weights 1, 2, and 1 respectively?

What is the weighted mean of the scores 80, 90, and 70 with weights 1, 2, and 1 respectively?

Step 1: Identify the scores and their corresponding weights. The scores are 80, 90, and 70. The weights are 1, 2, and 1 respectively.
Step 2: Multiply each score by its weight. Calculate 80 * 1, 90 * 2, and 70 * 1.
Step 3: Add the results of the multiplications together. This gives you the total score: (80 * 1) + (90 * 2) + (70 * 1).
Step 4: Calculate the total of the weights. Add the weights together: 1 + 2 + 1.
Step 5: Divide the total score from Step 3 by the total weights from Step 4. This gives you the weighted mean.

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