You collect balls. Suppose you start out with 7. John takes half of one more than the number of balls you have. Since his mother makes balls, Peter decides to triple your balls. How many balls do you have at the end?
Choose the correct choice.
A) 6	B) 7	C) 8	D) 9	E) 10
Solution   Start with 7 balls.   John takes half of one more than the number of balls you have. So John takes half of 7 + 1 which is 4,   so you're left with   7 - 4= 
<gadget id="calculator">  7 - 4</gadget>
<output>3</output>
3.   Peter triples the number of balls you have: 3 × 3= 9 balls.   So you have 9 at the end.   Correct answer : 9
<result>D</result>
You collect balls. Suppose you start out with 7. John takes half of one more than the number of balls you have. Since his mother makes balls, Peter decides to triple your balls. How many balls do you have at the end?