first we divide 280/35=8 then we do this division with the answer from that one previously to the stocks she purchased .. Then when we do the working , htis is the answer 400÷8=50
Answer:
50
Step-by-step explanation:
there are two methods for solving this problem
I.first we find the price for a stock by dividing their price by the number of sold stocks
280/35=$8
to find the number of stocks that ammount to $400 we divide $400 by the price of 1 stock
400/8=50 stocks
II.we use the rule of three
35 shares of stock cost..............$280
x shares of stock cost..............$400
to find x we multiply the elements on the diagonal and divide them by what's left
x=35*400/280=50 stock
