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Sergeu [11.5K]
2 years ago
15

What is an explanation or picture of how to work out the problem 8.13-2.716

Mathematics
1 answer:
icang [17]2 years ago
8 0

Answer:

5.414

subtract 8.13 from 2.716 and u will get ur answer

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If a 12-student class averaged 90 on a test, and a 20-student class averaged 80 on the test, then all 32 students averaged
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Let the marks of the students in class 1 be

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\frac{m_1+ m_2+ .....+ m_1_2}{12}=90

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similarly, let n_1, n_2, ....., n_2_0 be the marks of the students in the second class, 

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\frac{(m_1+ m_2+ .....+ m_1_2)+(n_1+ n_2+ ..... n_2_0)}{12+20}= \frac{1080+1600}{32}= \frac{2680}{32}=   83.75
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