The average (arithmetic mean) of the weight of 10 vehicles is 12.2 tons. The average weight of the group of vehicles increased by 2.6 tons after a new heavy duty truck was added to the group? What is the weight in tons of the heavy duty truck?
","rationale_html":"The new average is 14.8 tons.
On average, the ten trucks are 2.6 tons below the average for a total weighting of 26 tons.
Therefore, the added truck must be 14.8 + 26 = 40.8 tons
The answer is A.
","correct_answer":["A"],"equiv_key":"a4accb5f9b5c045539873d51","has_media":false,"has_mathml":false,"has_table":false,"section_label":"Mathematics","options":[{"label":"A","content_html":"40.8
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","ord":1},{"label":"C","content_html":"42.2
","ord":2},{"label":"D","content_html":"43.5
","ord":3},{"label":"E","content_html":"44.8
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