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jonny [76]
2 years ago
11

The library has 65,400 art books and 9,600 science book what part off all books are science books?

Mathematics
1 answer:
Mashcka [7]2 years ago
8 0
9600/65400 = 0.147 (14.7%)
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Step-by-step explanation:

Since we have given that

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s=\sqrt{\dfrac{n_1\sigma_1^2+n_2\sigma_2^2}{n_1+n_2-2}}\\\\s=\sqrt{\dfrac{50\times 0.08^2+25\times 0.06^2}{50+25-2}}\\\\s=0.075

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