Question

In a box of pens, 26% of them are red, 38% are blue and the remaining ones are black. There are 57 blue pens in the box. How many pens are in the box

Answer 1

Answer:

150

Step-by-step explanation:

• Let the total number of pens = x
• number of blue pens = 38/100 * x
• 57 = 38/100 * x
• x = 57 / ( 38/100 ) = 57 * 100/38 = 150

Answer 2

Answer:

150 pens

Step-by-step explanation:

Let the total number of pens in the box be x

So

Red pens = 26% of x = 26x/100

&

Blue pens = 38% of x = 38x/100

&

Remaining i.e. 100% - (26 +38)% = 100 - 64 = 36%

36% are black pens = 36x/100

Also given

Blue pens = 57

=> 38x/100 = 57

= 38x = 57 × 100

= x = 5700/38 = 150

Total number of pems in the box are 150 pens