5 of seven are not minivans - > 5/7
5/7*161=115
2(1.25x+3)=23.5
2.5x+6=23.5
Conditional probability formula is:P ( A and B ) = P ( A ) · P ( B / A )0.46 = P ( A ) · 0.31P ( A ) = 0.46 : 0.31P ( A ) = 1.48And this is impossible because 0 ≤ P ( A ) ≤ 1The student obviously made a mistake.
Answer:
1.533333 miles per hour
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