Question

In a party decorations total r balloons were used. There were b blue balloons, twice as many green balloons, and the rest of balloons were yellow. How many yellow balloons were used?

Answer 1

The answer is r-3b

Answer 2

No. of yellow balloons = r - b -
`(b)/(2)`

Explanation:

Total number of balloons = r

No of blue balloons = b

Blue balloons are twice the no of green balloons. so

No. of green balloons =
`(b)/(2)`

No of yellow balloons = ( Total number of balloons ) - ( No of blue balloons ) - ( No. of green balloons )

⇒ No. of yellow balloons = r - b -
`(b)/(2)`