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iragen [17]
2 years ago
5

4. One printing machine printed 1920 books in 40 hours this week. A

Mathematics
1 answer:
Alecsey [184]2 years ago
6 0
2880 books

Divide 1920 by 40
Then multiply the number by 2
You will get 96
Then multiply it by 30
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Andrej [43]

The expected value of the inseam length of the jeans is found as

30% of 30+ 25% of 32+ 10% of 34+ 10% of 36 + 10% of 38 + 15% of 40

= \frac{30}{100}\times30 +\frac{25}{100}\times32+ \frac{10}{100}\times34+ \frac{10}{100}\times36 +\frac{10}{100}\times38+ \frac{15}{100}\times40

= 9+8+3.4+3.6+3.8+6=33.8

Hence, the third option 33.8 is the correct expected value.

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3 years ago
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Ket [755]

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Ratio of 2:3 white flour to whole wheat flour to total of 10 cups flour
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