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marshall27 [118]
3 years ago
7

What is the value of the following expression? 2×{6+[12÷(3+1)]}-1

Mathematics
2 answers:
dlinn [17]3 years ago
7 0
First of all 3+1=4
Next divide 12 and 4 that equals 3
3+6 is equal to 9
9×2=18
Finally 18-1=17
My answer is 17
irga5000 [103]3 years ago
3 0
3+1=4
12/4=3
6+3=9
9*2=18
18-1=17
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In case A, as the error would be a difference of 1, the assumption could be mantained, but in case B the difference will be bigger, showing that the ratio is not 3:1 but 4:1.

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Given that a preliminary study was carried out to test the hypothesis that the ratio of white to dark herons on the island was 3:1, but A) a small census found 16 white morphs and 4 dark, to determine if the assumption of a 3 :1 ratio could be rejected, and B) to determine the same question if the census were larger with 160 white morphs and 40 dark, the following calculations must be made:

A)

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B)

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