There are more then 40 students on a trip to Boston. If,at a certain time, 2/7 of the students are on a bus and 1/3 of the other students are in stores, what is the total number of students on the trip?
the answer is out of a)21 b)30 c)42 d)57 e)64
And I need to know how you got it.
2007-09-16 16:03:28 · 4 answers · asked by xoamanda511ox 2 in Education & Reference ➔ Homework Help
obviously a and b are not correct because they are both less than 40, but you number should be a factor of both 7 (because 2/7 of them is an integer!) the only number among 42, 57 and 64 which is a factor of 7 is 42, so (c) is the correct choice.
G.L!
2007-09-16 16:08:21 · answer #1 · answered by Nebulus 2 · 0⤊ 0⤋
Not a) and b), because it have to more than 40 students
And then, let total number of students as X
(2/7)X on the bus, so (5/7)X are out of the bus
In that (5/7)X students, there are (1/3) are in stores
so there are (5/21)X students are in stores
so the answer should be c
because just 42/21 = 2
the others are no the whole number
2007-09-16 16:15:18 · answer #2 · answered by Dick 1 · 0⤊ 0⤋
Are you sure u wrote the question right? How can it ask how many students are on the trip if the first line says there are more than 40 students on a trip. If its right, then its not a or b. Good luck!
2007-09-16 16:11:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋
This is what I call an "eyeball it" question.
You can eliminate a) because it is less than 40
You also have to have an answer that is divisible by 7 because of the (2/7) number.
The only one that does that is c)42
2007-09-16 16:08:43 · answer #4 · answered by ignoramus 7 · 0⤊ 0⤋