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22 September, 15:02

The National Safe Kids Campaign and Bell Sports sponsored a study that surveyed 8,159 children ages 5 to 4 who were riding bicycles. Approximately 2/5 of the children were wearing helmets, and of those, only 13/20 were wearing the helmets correctly. About how many of the children were wearing helmets correctly?

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  1. 22 September, 15:16
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    2/5 of 8159 children = [2*8159] : 5 = 3263.6 children

    of 3263.6 children, 13/20 wear helmet correctly

    13/20 * 3263.6 = [3263.6 * 13] : 20 = 2121.34 children

    Around 2121 children wear helmet correctly
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