In the decimal, 2.4d7, d represents a digit from 0 to 9. If the value of the decimal rounded to the nearest tenth, is less than 2.5, what are the possible values of d?
0,1,2
0,1,2,3,4
5,6,7
5,6,7,8,9
A
0,1,2
B
5,6,7
C
5,6,7,8,9
D
0,1,2,3,4
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Solution
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The correct answer is {0,1,2,3,4}.
: If d≥5, the decimal rounded to the nearest tenth will be greater than 2.5.
Hence, option B is correct.
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