for every 12 people crossing the street, 7 of them used the pedestrian lane and the rest did not. if 48 people crossed the street, how many did not cross in the pedestrian lane?

Question

for every 12 people crossing the street, 7 of them used the pedestrian lane and the rest did not. if 48 people crossed the street, how many did not cross in the pedestrian lane?

Hi Steve, the choices of answers to this question are the following: a)28; b)24; c)36; d)41.

your solution below gave 20 which is NOT one of the choices. kindly help.

math - Steve, Thursday, November 19, 2015 at 11:52pm
7x+5x=48
x=4

5x=20

Answer 1

Let's try a proportion.

5/12 = x/48

12x = 240

x = 20

Since neither Steve nor I got the same answer, I assume there's an error in your problem. Please check with your teacher.

Answer 2

for every 12 people crossing the street, 7 of them used the pedestrian lane and the rest did not. if 48 people crossed the street, how many did not cross in the pedestrian lane?

Answer 3

Apologies for the confusion. Let me clarify the steps:

Given that for every 12 people crossing the street, 7 of them used the pedestrian lane and the rest did not.

Let's assume the number of people who did not cross in the pedestrian lane to be x.

So, the number of people who used the pedestrian lane = 12 - x.

We are also given that 48 people crossed the street, so we can write the equation:

(12 - x) + x = 48

Simplifying the equation:

12 - x + x = 48

12 = 48

This equation does not have a valid solution, as it results in an incorrect identity.

Therefore, it seems there was an error in the initial problem statement. The given information is not consistent, and we cannot determine the number of people who did not cross in the pedestrian lane.

Answer 4

To solve this problem, we can set up an equation based on the given information.

Let's say that x represents the number of groups of 12 people who used the pedestrian lane. Since we know that 7 out of every 12 people used the pedestrian lane, we can say that 7x represents the number of people who used the pedestrian lane.

The rest of the people, who did not use the pedestrian lane, would be represented by the difference between the total number of people who crossed the street (48) and those who used the pedestrian lane (7x). So, the number of people who did not use the pedestrian lane can be represented by 48 - 7x.

To find the value of x, we can set up the equation:

7x + (48 - 7x) = 48

Simplifying the equation:

7x + 48 - 7x = 48

The x terms cancel out, leaving us with:

48 = 48

This equation is true for any value of x, which means that there is no unique solution to this problem. Therefore, we cannot determine the specific number of people who did not use the pedestrian lane from the given information.