Problem: Everyone in a class of 30 students take math and history. Seven students received an “A” in history, 13 received an “A” in math, and 4 received an “A” in both courses. How many students did not receive an “A” in either course?
2006-11-26 08:06:43 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
7 students got an A in history, and 4 of those got an A in both, so 3 got an A in history but not math.
13 got an A in math, and 4 of those got an A in both, so 9 got an A in math but not history.
The total number of students who got As are the 3 in history only + the 9 in math only + the 4 in both = 16 total.
There are 30 students in the class, so 30 - 16 = 14 didn't get As in either one.
2006-11-26 08:09:45 · answer #1 · answered by Jim Burnell 6 · 1⤊ 0⤋
If four received an A in both courses, then 7-4=3 received an A only in history, and 13-4=9 received an A only in math.
Thus, 4 received an A in both, 3 received and A in history, and 9 received an A in math. Totalling 16 people who got A's and 14 who didn't.
2006-11-26 16:11:19 · answer #2 · answered by brandonlsmithe 2 · 0⤊ 0⤋
4 received an A in both courses
7 received an A in history, of whom 4 received an A in math also, and 3 in only history
13 received an A in math, of whom 4 received an A in history also, and 9 only in math
So, of 30 students, 4 received an A in both, 3 only in history, and 9 only in math. That leaves 30-4-3-9=14 students who didn't receive an A in either course.
2006-11-26 16:10:47 · answer #3 · answered by Michel_le_Logique 4 · 0⤊ 0⤋
Hi. Start by taking 4 students (s) with both 'A' away, leaving 26. Obviously you take 's' from the 7 (leaving 3) and 13 (leaving 9). So 12 got just 1 A. 26 minus 12 =
2006-11-26 16:14:15 · answer #4 · answered by Cirric 7 · 0⤊ 0⤋
6.
30students - 7history= 23students left -13math=10students left -4history and math = 6 students who did not recieve A in either course
2006-11-26 16:18:18 · answer #5 · answered by Leyla G 1 · 0⤊ 0⤋
do u share ur grade w/ me if i get it right?
do the homework urself. and people wonder why the US education system is going downhill.
Kids need to get off of the net and focus on their studies and do the homework THEMSELVES!
go ahead and give me a thumbs down rating. its the truth.
2006-11-26 16:18:10 · answer #6 · answered by nonsense_5 3 · 0⤊ 0⤋
Asking it twice will not help. Read the answer to your OTHER identical question first, you already have plenty of right answers there.
2006-11-26 16:08:53 · answer #7 · answered by Vincent G 7 · 0⤊ 0⤋
uhm, i know there will be at least one student with F's in both subjects - you
2006-11-26 16:10:04 · answer #8 · answered by Anonymous · 1⤊ 0⤋
do ur own work
2006-11-26 16:20:52 · answer #9 · answered by unrealband4 1 · 0⤊ 0⤋
do your own home work....................
2006-11-26 16:14:03 · answer #10 · answered by BLOODHOUND 6 · 1⤊ 0⤋