Of 100 apples in a tree, 30 percent are green. How many red apples must be picked in order to bring the number of green apples up to 50 percent of the apples in the tree?
Pick:	A) 40	B) 50	C) 30	D) 70	E) 20
Now, there are 30 green apples (30% of 100) and   100-30= 
<gadget id="calculator">  100-30</gadget>
<output>70</output>
70 red apples in the tree. We need there to be 30 green apples and 30 red apples, in this case there will be 50% green apples and 50% red apples.   Therefore  70-30= 
<gadget id="calculator"> 70-30</gadget>
<output>40</output>
40 red apples must be picked.   40nswer: 40.
<result>A</result>
Of 100 apples in a tree, 30 percent are green. How many red apples must be picked in order to bring the number of green apples up to 50 percent of the apples in the tree?