there are 6 people in the elevator. their average weight is 150 lbs. another person enters the elevator, and increases the average weight to 151 lbs. what is the weight of the 7 th person. Select
A) 157  B) 168  C) 189  D) 190  E) 200
<gadget id="calculator">151 * 7</gadget>
<output>1_057</output>

<gadget id="calculator">6 * 150</gadget>
<output>900</output>

<gadget id="calculator">1_057 - 900</gadget>
<output>157</output>

<result>A</result>
there are 6 people in the elevator. their average weight is 150 lbs. another person enters the elevator, and increases the average weight to 151 lbs. what is the weight of the 7 th person.
subtract(multiply(151, 7), multiply(6, 150))
"solution average of 7 people after the last one enters = 151 . â ˆ ´ required weight = ( 7 x 151 ) - ( 6 x 150 ) = 1057 - 900 = 157 . answer a"