There are 1,800 students at a high school. Of the students who have smoked at least one cigarette in the last month, five-eighteenths are twelfth graders. Thirty-five percent of the remaining students are eleventh graders, and the rest are in the ninth and tenth grades. If there are 169 students in the ninth and tenth grades who have smoked at least one cigarette in the last month, how many students in all have smoked at least one cigarette in the last month?

260 students
360 students
50 delegates
35 delegates

These choices do not make sense because 5/18 of 1800 is 500 by itself ???

5/18 of the total smokers are in 12th grade.

You need to find how many smokers there are.

That's not true.

See what it says

Of the students who have smoked at least one cigarette in the last month, five-eighteenths are twelfth graders.

That equals 500 more than all the choices given

4+_3=_5

7x+3.=

To solve this problem, we need to piece together the information given step by step. Let's break it down:

1. We are told that there are 1,800 students at the high school.
2. Of these students who have smoked at least one cigarette in the last month, 5/18 are twelfth graders.
- So, the number of twelfth graders who have smoked at least one cigarette can be calculated by multiplying 5/18 by the total number of students (1,800): (5/18) * 1,800 = 500.
3. Now, we need to find the number of non-twelfth grade students who have smoked at least one cigarette in the last month.
- We can calculate this by subtracting the number of twelfth graders (500) from the total number of students (1,800): 1,800 - 500 = 1,300.
4. We are also given that 35% of the remaining students are eleventh graders.
- To find the number of eleventh graders who have smoked at least one cigarette, we multiply 35% by the number of non-twelfth graders: (35/100) * 1,300 = 455.
5. Now, we know that the remaining 169 students are in the ninth and tenth grades who have smoked at least one cigarette.
6. So, to find the total number of students who have smoked at least one cigarette in the last month, we add the number of twelfth graders (500), eleventh graders (455), and ninth/tenth graders (169): 500 + 455 + 169 = 1,124.

Therefore, the correct answer is that there are 1,124 students in total who have smoked at least one cigarette in the last month.