3 years ago

Find the missing number. 30,______ 19, 13 1/2.

Mathematics

1 answer:

Andru [333]3 years ago

5 0

The answer is 24.5 because $19-13 \frac{1}{2} = 5 \frac{1}{2}$ so you add 5.5 from 19 to get the answer

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4 years ago

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andriy [413]

Answer:

The mean score for all students on the quiz was 86.

Step-by-step explanation:

This question is solved by a weighed average.

To find the weighed average, we add the values multiplied by their weight, and after that we divide by the sum of weights.

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So 90 has a weight of 30.

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