08.12.2022

The ratio of boys to girls in a class is 3:4. There are 35 students in the class. How many students are boys?

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Step-by-step answer

24.11.2021, solved by verified expert
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Let's say the number of boys is X and the number of girls is Y.Then we have 35 students in the class, this means X+Y=35The ratio of boys to girls is 3:4, so if we multiply the number of girls (Y) in the class by 3 and the number of boys (X) by 4 they should be equal 4x=3yNow we have 2 with 2 variables Let's multiply the first equation by 4, 4x+4y=140 Now replace the 4x with 3y, 7y=140So we have 20 girls in the class (y=20) and 15 boys (20+15=35)The answer is: we have 5 more girls in the class
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Mathematics
Step-by-step answer
P Answered by PhD

Step-by-step explanation:

So let's keep the missing number as x

So the ratio becomes 3x:4x

And according to the question,

3x + 4x = 35

7x = 35

x = 35/7

x = 5

So to find the number of boys:- 3 * 5 = 15

Number of girls:- 4 * 5 = 20

Therfore, Difference = 20 - 15

= 5 students

Hope you understood :)

Mathematics
Step-by-step answer
P Answered by PhD

5

Step-by-step explanation:

sum the parts of the ratio, 3 + 4 = 7 parts

Divide the number of students by 7 to find the value of one part of the ratio

35 ÷ 7 = 5 ← value of 1 part of the ratio, then

3 parts  3 × 5 = 15 ← number of boys

4 parts = 4 × 5 = 20 ← number of girls

20 - 15 = 5

There are 5 more girls than boys

Mathematics
Step-by-step answer
P Answered by Master

Let's say the number of boys is X and the number of girls is Y.

Then we have 35 students in the class, this means X+Y=35

The ratio of boys to girls is 3:4, so if we multiply the number of girls (Y) in the class by 3 and the number of boys (X) by 4 they should be equal 4x=3y

Now we have 2 with 2 variables

Let's multiply the first equation by 4, 4x+4y=140

Now replace the 4x with 3y, 7y=140

So we have 20 girls in the class (y=20) and 15 boys (20+15=35)

The answer is: we have 5 more girls in the class

Mathematics
Step-by-step answer
P Answered by PhD

Dunno and I’m not sure very much      

Mathematics
Step-by-step answer
P Answered by PhD

Dunno and I’m not sure very much      

Mathematics
Step-by-step answer
P Answered by PhD

20 students are girls. (15 are boys)

Step-by-step explanation:

if the ratio is 3:4 and the total students is 35, you can make the following equation:

3x + 4x = 35

7x = 35

x = 5

then, multiply x by 4.

5*4 = 20.

20 students are girls. (15 are boys.)

sorry if this isn't well explained. hopefully I still helped!

Mathematics
Step-by-step answer
P Answered by PhD
Boy = 20 and Girl = 15

Explanation:

Boy = 35 x 4/7 = 20

Girl = 35 x 3/7 = 15
Mathematics
Step-by-step answer
P Answered by PhD

5 more boys in class than girls

Step-by-step explanation:

Total number in a class is 35

Ratio of boys to girls is 4:3

Boys =4

Girls =3

Add the two together to give 7

Boys = 4/7×35

Boys =4×5

=20boys

Girls= 3/7×35

Girls =3×5

=15girls

So we have 20boys and 15girls

To know how many more boys than girls

Deduct the number of boys to girls

To give

20-15=5

There are 5more boys in class than girls

Mathematics
Step-by-step answer
P Answered by PhD
Boy = 20 and Girl = 15

Explanation:

Boy = 35 x 4/7 = 20

Girl = 35 x 3/7 = 15
Mathematics
Step-by-step answer
P Answered by PhD

20 boys

Step-by-step explanation:

then the ratio of the boys and girls =4+3=7

4/7×35=20 boys

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