There are total 30 students in the piano class.
<h3>What is Ratio and Proportion ?</h3>
When a number can be divided by another number then they can be written as p : q , when two ratios can be equated using an equal sign then they are said to be in proportion.
It is given that the total number of girls is 40% of the total students
The ratio of total students to girls is 100 :40
= 10 :4
= 5 : 2
It is also given that in the total number of students 12 were girls
Let total students be x
Then the ratio is x : 12
As both the ratio are same and so can be equated and the proportion will be
5 : 2 = x : 12
5/2 = x /12
x = 30
Therefore there are total 30 students in the piano class.
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Answer:
62.5
All you do is divide 5 by 8 and you get this .625 move the decimal over two spots to the right and you get 62.5%
Answer:
x=42
Step-by-step explanation:
so they u the exterior angle is 132
line makes 180 degree
180-132 =48
now they tell u a right angle
that is 90
triangles interior angles add up to 180
180-90-48=
42
<h3>Brainliest Please</h3>
Answer:
true
Step-by-step explanation:
it is good to go back to the equation because maybe you placed a number wrongly or you did not understood the problem correctly