Chavez Salinas
04/24/2024 · High School
2. The traffic police recorded the speed (in \( \mathrm{km} / \mathrm{h} \) ) of 10 motors as \( 47,53,49 \), \( 60,39,42,57,55,48 \) and 52 . Later on an error in the recording instrument was found. Find the correct mean speed of the motors if the instrument recorded the speed \( 6 \mathrm{~km} / \mathrm{h} \) less is each case. \( \begin{array}{llll}\text { (A) } 55.2 \mathrm{~km} / \mathrm{h} & \text { (B) } 56.2 \mathrm{~km} / \mathrm{h} & \text { (C) } 57.2 \mathrm{~km} / \mathrm{h} & \text { (D) } 58.2 \mathrm{~km} / \mathrm{h} \\ \text { (E) None of these } & & \end{array} \)
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The correct mean speed of the motors is 56.2 km/h.
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