The number of students who were present là danh từ + gì
Đổi tick nha
there were 550 students who participated in a quiz of 5 math problems, and 2011 problems were solved correctly in all. it is found out that every participant solved correctly at least 1 problem. it also know that 59 students got 1 problem correct, 69 students were able to answer all problem correctly while the number of students who 2 correct and 3 correct answer were the same. how many of the students got 4 correct answers
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 \(\frac{5}{6}.\)
The ratio of the number of girls to the number of boys in a classroom is 5:4. When 10 girls left the classroom, then ratio of the number of boys to the number of girls became 4:3. How many students were in the classroom at first? Answer: There were ….. students the classroom at first
10 studens :
5-3=2 parts
1 part
10:2=5 studens
that class has
5x9=45 studens
answer:45 studens
there were 45 students the classroom at first
there were 45 students the classroom at first
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?
Choose the best answer
1. The number of students who knew the answer to the last questions on the exam _____ very low
A. were B. was C. have been D. has been
2. _____ waiting to hear the results
A. Everyone was B. All was C. Everyone were D. All were
3. "We need new curtains" - "Ok, let's buy _____"
A. one B. ones C. some with flowers on D. ones with flowers on
4. _____ the furniture _____ arrived yet
A. none ... has B. none ... have C. none of ... has D. none of ... have
5. A number of students _____ in intensive language programs abroad nowaydays
A. participated B. has participated
C. have participated D. is paricipating
6. Everyone of the boys and girls in the school _____ what to do with the fire alarm _____
A. knows - rings B. know - rings
C. knows - will ring D. would know - rang
7. Some of these people are friends of mine and _____ people from the office
A. the rest is B. the rest are C. rest is D. rest are
8. Knowing several _____ helpful if you work for an international cooperation
A. languages are B. language is
C. languages is D. language are
9. Three hours _____ a long time to take on the homework
A. seems B. seem C. seemed D. has seemed
1. The number of students who knew the answer to the last questions on the exam _____ very low
A. were B. was C. have been D. has been
2. _____ waiting to hear the results
A. Everyone was B. All was C. Everyone were D. All were
3. "We need new curtains" - "Ok, let's buy _____"
A. one B. ones C. some with flowers on D. ones with flowers on
4. _____ the furniture _____ arrived yet
A. none ... has B. none ... have C. none of ... has D. none of ... have
5. A number of students _____ in intensive language programs abroad nowadays
A. participated B. has participated
C. have participated D. is paricipating
6. Everyone of the boys and girls in the school _____ what to do with the fire alarm _____
A. knows - rings B. know - rings
C. knows - will ring D. would know - rang
7. Some of these people are friends of mine and _____ people from the office
A. the rest is B. the rest are C. rest is D. rest are
8. Knowing several _____ helpful if you work for an international cooperation
A. languages are B. language is
C. languages is D. language are
9. Three hours _____ a long time to take on the homework
A. seems B. seem C. seemed D. has seemed
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 !
There are 50 students in a class. If 14% are absent on a particular day, find the number of students
present in the class.
TK
There are total 50 students in a class. Number of students absent on a particular day =14% of 50=14100×50=7 50 = 14 100 × 50 = 7 . Therefore, the number of students present =50−7=43 = 50 − 7 = 43 students.
There are total 50 students in a class.
Number of students absent on a particular day =14% of 50=14100×50=7 50 = 14 100 × 50 = 7 .
Therefore, the number of students present = 50−7=43 = 50 − 7 = 43 students
Answer : 43 students
The ratio of the number of girls to the number of boys in a classroom is 5 : 4.
When 10 girls left the classroom, the ratio of the number of boys to the number of girls
became 4 : 3. How many students were in the classroom at first
Tỉ số nữ và nam lúc sau là \(\dfrac{3}{4}\)
10 bạn nữ chiếm số phần bạn nam là
\(\dfrac{5}{4}-\dfrac{3}{4}=\dfrac{1}{2}\) ( số HS nam )
Số học sinh nam là
\(10\div\dfrac{1}{2}=20\) ( học sinh )
Số học sinh nữ là
\(20\times\dfrac{5}{4}=25\) ( học sinh )
Số học sinh trong lớp học lúc đầu là
\(20+25=45\) ( học sinh )
The ratio of the number of girls to the number of boys in a classroom is 5:4.When 10 girls left the classroom, the ratio of the number of boys to the number of girls became 4:3. How many students were in the classroom at first?
Tỷ lệ số lượng HS nữ và HS nam trong một lớp học là 5: 4. Khi 10 HS nữ rời khỏi phòng học, tỷ lệ số HS nam và HS nữ trở thành 4: 3. Lúc đầu trong phòng có tổng cộng bao nhiêu HS?
Dịch đến thế rồi thì bạn tự giải nhé
tại sao bạn lại ra là 45 học sinh? Đào Hải Hưng?
The ratio of the number of girls to the number of boys in a classroom is 5:4. When 10 girls left the classroom, then ratio of the number of boys to the number of girls became 4:3. How many students were in the classroom at first? Answer: There were 45students the classroom at first.(Tỷ lệ số lượng các cô gái đến số trẻ em trai trong một lớp học là 5 : 4 . Khi 10 cô gái rời khỏi lớp học , sau đó tỷ lệ số trẻ em trai để số lượng các cô gái trở thành 4 : 3 . Có bao nhiêu học sinh trong lớp học lúc đầu ? Trả lời: Có 45 sinh viên các lớp học đầu tiên.)