In semester I, the number of good students in class 6D was equal to \(\dfrac{2}{7}\) of the remaining students. Into semester II, the number of good students increased by 8 students (the number of students in the class was unchaged), so the number of good students became \(\dfrac{2}{3}\) of the rest. How many students were there in class 6D?
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In semester I, the number of good students in class 6D was equal to 2/7 of the remaining students. Into semester II, the number of good students increased by 8 students ( the number of students of the class was unchanged), so the number of good students became 2/3 of the rest. How many good students of class 6D were there in semester I ?
Ai làm nhanh mà đúng, mình tích cho !
27 tháng 12 2023 lúc 21:57
In the fỉrst semester, the ratio between excellent student and the rest of this class are 3/7. In the next semester, there are 4 good students becomes excellent, so that the number of excellent are 2/3 the rest. How many students are there in this class?
The ratio of the number of girl students to the number of boy students in a class is 3: 5 and the number of boy students is 12 students more than the number of girl students. There are...students in this class
There are 48 students in a class. The ratio of the number of the girl students to the number of boy students is 1: 3. How many girl students are there in the class?
kho....................wa..................troi.......................thi.....................ret.................lanh................wa..................tich............................ung.........................ho..............minh......................cho....................do....................lanh
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Có 48 học sinh trong một lớp. Tỷ lệ số lượng các cô gái sinh với số lượng học sinh cậu bé là 1: 3. Có bao nhiêu sinh viên cô gái đang có trong lớp học?
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My class has 40 students. The number of fair students is 4 more than the number of good students but is 8 less than the number of ordinary students. Find the number of students of each rank ( There is no poor students )
Giúp mình dịch bài toán này ra tiếng viết nha !
Lớp tôi có 40 học sinh. Số học sinh khá nhiều hơn số học sinh giỏi là 4 bạn nhưng ít hơn số học sinh trung bình là 8 bạn. Tìm số học sinh mỗi loại. ( Không có học sinh yếu ).
There are 48 students in a class. The ratio of the number of the girl students to the number of boy students is 1: 3. How many girl students are there in the class?
Answer: There are...... girl students.
Class A and Class B have the same number of students.-The number of students in class A who took part in a mathematics competition is frac{1}{3} of the studentsin Class B who did not take part.-the number of students in class B who took part in a mathematics competition is frac{1}{5}of the students in class A who đi not take part.Find the ratio of the number of students in class A who did not take part in this competition to the number of students in class B who did not take part.
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Class A and Class B have the same number of students.
-The number of students in class A who took part in a mathematics competition is \(\frac{1}{3}\) of the studentsin Class B who did not take part.
-the number of students in class B who took part in a mathematics competition is \(\frac{1}{5}\)of the students in class A who đi not take part.
Find the ratio of the number of students in class A who did not take part in this competition to the number of students in class B who did not take part.
I call the number of students didn't take part in Mathemas Competition in class A & B are a & b respectively
(with condition: a & b \(\in\)N*)
,From the theme, we have: \(\frac{1}{3}b+a=\frac{1}{5}a+b\)(Because rhe number of students in 2 class is the same)
\(\Leftrightarrow\frac{b}{3}-b+a-\frac{a}{5}=0\Leftrightarrow\left(-\frac{2b}{3}\right)+\frac{4a}{5}=0\)
\(\Leftrightarrow\frac{4a}{5}-\frac{2b}{3}=0\Leftrightarrow\frac{12a-10b}{15}=0\Leftrightarrow12a=10b\)
\(\Rightarrow\frac{a}{b}=\frac{10}{12}=\frac{5}{6}\)
So the ratio of the number of student didn't take part of Class A & B is \(\frac{5}{6}.\)
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There are 48 students in a class. The ratio of the number of the girl students to the number of boy students is \(\frac{1}{3}\). How many girl students are there in the class?
there are 12 girls in the class
bai nay minh lam roi
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Class 5A has 8 more students than class 5B. The number of students of class 5A and class 5B are in the ratio of 9 : 7. How many students are there in class 5B?
The number of students of class 5B is:
8 : (9 - 7) × 7 = 28 (students)
The number of students of class 5A is:
8 : (9 - 7) × 9 = 36 (students)
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mn ơi mik ko bt xem đáp án ở đâu, mn chỉ mik với
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