SOLUTION: Amy is in a line to buy a ticket. There are twice as many people in front of Amy as there are behind her. How many people are there in the line, if Amy is the 7th person in it? A

Question 1144959: Amy is in a line to buy a ticket. There are twice as many people in front of Amy as there are behind her. How many people are there in the line, if Amy is the 7th person in it?
A)24
B)22
C)21
D)10
Answer by ikleyn(52786) (Show Source): You can put this solution on YOUR website!
.

It is very good problem to exercise your mind, from the age of 7 to 77.


There are 6 persons in front of Amy,  and this amount of 6 is twice as many people are behind her.


Hence, there are 6/2 = 3 persons behind Amy.


Therefore, there are 6 + 1 + 3 = 10 persons in the line, in all.


The person marked by the number 1 in this expression, is Amy herself.


ANSWER.  There are 10 persons in the line, in all.

Come again to this forum soon to learn something new (!)

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