a car dealership has 40 cars on the lot, 15 % of which are silver. if the dealership receives a new shipment of 80 cars, 45 % of which are not silver, what percentage of total number of cars are silver? Choose one.
A) 30 %
B) 35 %
C) 40 %
D) 45 %
E) 50 %
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">40 * (3/20)</gadget>
<output>6</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">80 * (9/20)</gadget>
<output>36</output>

<gadget id="calculator">6 + 36</gadget>
<output>42</output>

<gadget id="calculator">40 + 80</gadget>
<output>120</output>

<gadget id="calculator">42 / 120</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(7/20) * 100</gadget>
<output>35</output>

<result>B</result>
a car dealership has 40 cars on the lot, 15 % of which are silver. if the dealership receives a new shipment of 80 cars, 45 % of which are not silver, what percentage of total number of cars are silver?
multiply(divide(add(multiply(40, divide(15, const_100)), multiply(80, divide(45, const_100))), add(40, 80)), const_100)
"the number of silver cars is 0.15 * 40 + 0.45 * 80 = 42 the percentage of cars which are silver is 42 / 120 = 35 % the answer is b ."