in a stationary shop,pen and pencil are in ratio 4:9 .if there are 100 pens, find a number of pencil
Wrong amswer
To find the number of pencils, we need to determine the ratio of pencils to pens first.
Given that the ratio of pens to pencils is 4:9, we can express this as:
Pens : Pencils = 4 : 9
According to the information in the problem, there are 100 pens. We can use this to find the number of pencils.
Let's set up a proportion to solve for the number of pencils:
Pens / Pencils = 4 / 9
Since we know the number of pens is 100, we can substitute this value into our equation:
100 / Pencils = 4 / 9
Now we solve for the number of pencils (Pencils):
Cross-multiplying the equation, we get:
9 * 100 = 4 * Pencils
900 = 4 * Pencils
Dividing both sides of the equation by 4, we find:
Pencils = 900 / 4
Pencils = 225
Therefore, there are 225 pencils in the stationary shop.
Wrong answer is this
If you take the number of pencils as x, then the given ratio and the number of pens to pencils is proportional.
=> 4/9 = 100/x
=> x = (100/4)*9
=> x = 25*9
=> x = 175