the ratio of pens to pencil in a class is 2:5. If there are 25 pens. How many pencils are there?
To find the number of pencils, we need to use the ratio given. The ratio of pens to pencils is 2:5.
First, we can determine the value of 1 unit in the ratio by dividing the total number of pens by the number of units representing pens. Since there are 25 pens, 1 unit is equal to 25/2 = 12.5 pens.
Next, we can find the number of units representing pencils by multiplying the value of 1 unit by the number of units representing pencils. Since there are 5 units representing pencils, the number of pencils is 12.5 x 5 = 62.5.
Since you cannot have a fraction of a pencil, the answer is that there are 62 pencils in the class.
To find the number of pencils, we need to use the given ratio.
The ratio of pens to pencils is 2:5, which means for every 2 pens, there are 5 pencils.
If we know there are 25 pens, we can use this information to find the number of pencils.
First, we need to determine how many sets of 2 pens are in 25 pens. We can divide 25 by 2:
25 pens ÷ 2 pens/set = 12.5 sets
Since we can only have whole sets, we know that there are 12 sets of 2 pens in 25 pens.
Now, we can find how many pencils there are using the ratio.
Since there are 5 pencils for every 2 pens, we multiply 5 by the number of sets of 2 pens:
5 pencils/set × 12 sets = 60 pencils
Therefore, there are 60 pencils in the class.
25/x = 2/5
I think you'll find you have it backwards. So make the fix and finish it off.
63
25/2 = 12.5
12.5 x 5= 62.5