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9 July, 12:28

At an assembly 7 out of the first 10 students who entered the gym were carrying a backpack. Based on this information, if 700 students were at the assembly, how many students could be expected to be carrying a backpack?

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  1. 9 July, 12:46
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    7 out of 10 were carrying a backpack ... and 3 out of 10 were not

    that means 7/10 of the total students had backpacks and 3/10 of the total students did not

    7/10 * 700 = 4900/10 = 490 had backpacks <==

    3/10 * 700 = 2100/10 = 210 did not
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