Question

On a sports day a school bought 1,500 colour paper bundles in which 20% were green coloured, 30% were white coloured and remaining were blue coloured. Number of blue coloured bundles is

• A. $1000$
• B. $500$
• C. $700$
• D. $750$

Answer 1

The correct option is D $750$

There are total $1500$ colour paper bundles.

It is given that $20$% were green coloured. Therefore, number of green coloured paper bundles are:

$\frac{20}{100}\times 1500=300$

Also, $30$% were white coloured. Therefore, number of white coloured paper bundles are:

$\frac{30}{100}\times 1500=450$

Now, to find the number of blue coloured bundles, we have to add the number of green and white coloured bundles and subtract it from the total number of bundles as shown below:

No. of blue coloured bundles$=1500-(300+450)=1500-750=750$

Hence, the number of blue coloured bundles were $750$.