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The ratio of boys to girls in class 6 (1) is 11 to 10. Given that there are 22 boys, how many girls are there and how many students are there in the class
The ratio of boys to girls in class 6 (1) is 11 to 10. Given that there are 22 boys, how many girls are there and how many students are there in the class
There are 22 × 10 / 11 = 20 female students and 22 + 20 = 42 students in the class
Number of female students = 22 * 10 / 11 = 20
Class = 22 + 20 = 42
22 / 11 = 2, female 2 * 10 = 20, class 22 + 20 = 42
The average of the three numbers is 120. A is twice that of B, and C is five more than A. how much is the format of a, B and C?
Please help to solve the equation step by step
Let B be x, then a be 2x and C be 2x + 5
5x+5=360
x=71
2x=142
2x+5=147
Four fifths of the boys are equal to nine fifths of the girls. The ratio of boys to girls in this class is (): ()
9:8
The average number of the three numbers is 120. The number a is twice that of the number B. the number C is 4 more than the number A. what are the three numbers a, B and C?
Let B be x, then a be 2x and C be 2x + 4. According to the meaning of the question, we can get the equation: x + 2x + 2x + 4 = 120 × 3 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x + 4 = 360 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x = 356 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 71.2
The number of male students in a class is 58 of the total number of students in the class, and the number of female students is 10 less than that of male students?
The average number of the three numbers is 120. The number of a is twice that of B. the number of C is 5 more than that of A. what are the numbers of a, B and C?
Let B be x, then a is 2x and C is 2x + 5. According to the meaning of the question, we can get the equation: x + 2x + 2x + 5 = 120 × 3 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x + 5 = 360 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x = 355 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 71, so a is 71 × 2 = 142 and C is 142 + 5 = 147 a: A is 142, B is 71 and C is 147
There are 60 students in class 6.1. One third of the boys are transferred and 10 girls are transferred. At this time, the number of boys and girls is equal. How many boys and girls are there?
If you only make one kind of adult clothing, you can make 100 pieces of cloth. If you only make one kind of student clothing, each piece of cloth is 1.8 meters. Now you use this batch of cloth to make two kinds of clothes of the same number of trees, of which 108 meters is needed to make student clothing, and how many meters is needed to make an adult clothing?
A rope takes 5 / 15 meters. Here we use the remaining 3 / 2. How long is the rope?
Party A and Party B work together on a batch of parts. After a few days, Party A has a rest, and Party B continues to do it for five days. This takes three days more than the planned completion time. It is known that Party A does 60 parts a day. How many parts does Party B do every day?
The parts that the master and apprentice have made are 7:4. If the master makes one seventh less, the apprentice makes 60 more, and the two make the same amount, how many of them do the master and apprentice make?
For a batch of goods, Party A and Party B jointly transport 4.2% of the time, completing 3 / 4 of the task. It is known that Party A alone transport will be completed at 15:00, and Party B transport 4.2 tons per hour. How many tons of this batch of goods?
A barrel of oil weighs 8kg. After half of the oil is removed, the barrel weighs 4.5kg. How much is the original oil and how much is the seed?
There are 150 people in the two workshops. If 50 people are transferred from other places to the first workshop, the number of people in the first workshop is two-thirds of that in the second workshop. How many people are there in the second workshop?
A and B start at the same time from AB and run in opposite directions. They meet each other in 7 hours. Car a is 20 km slower than car B per hour. The speed ratio of the two cars is 7:9. How many km is the distance between AB and ab
To process, you can add points ~ ~. Note that I am still a primary school student
1. Suppose that there are x boys and (60-x) girls, then 2x / 3 = 50-x, x = 30 boys and 30 girls. 2. Each piece of cloth is 1.8 meters, and it takes 108 meters to make a student's clothes. There are 60 student's clothes and 60 adult's clothes. If only one kind of adult's clothes is made, 100 pieces can be made, that is to say, 60 pieces can be learned
The average number of the three numbers is 120. The number of a is twice that of B. the number of C is 5 more than that of A. what are the numbers of a, B and C?
Let B be x, then a is 2x and C is 2x + 5. According to the meaning of the question, we can get the equation: x + 2x + 2x + 5 = 120 × 3 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x + 5 = 360 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x = 355 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 71, so a is 71 × 2 = 142 and C is 142 + 5 = 147 a: A is 142, B is 71 and C is 147
There are several boys and girls. The ratio of boys to girls is 4:3. Later, there are 12 girls. At this time, the number of boys is twice that of girls,
If the original class size is x, then boys account for 4 / 7 of the class and girls account for 3 / 7 of the class
7x = 2 / 12 * (then)
X=84
The number of male students: 4 / 7 * 84 = 48
The number of female students is 3 / 7 * 84 = 36
The average number of a, B and C is 70. A is two to three, B is four to five, and B is ()
A is two to three, B is four to five
So we can set
12 for B and 8 for a
C is 15
therefore
1 portion = 70 × 3 ÷ (12 + 8 + 15) = 6
A = 8 × 6 = 48
B = 6 × 12 = 72
C = 6 × 15 = 90
B = 72
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