You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

[EX Q]: There are 41 pencils in the drawer. Mike placed 30 pencils in thedrawer. How many pencils are now there in total?
[EX A]: 71.0

[EX Q]: Fred has 709 green balloons, he gave Sandy 221 of the balloons.How many green balloons does he now have?
[EX A]: 488.0

[EX Q]: 0.5 the students in the band are in the trumpet section. 0.3 thestudents in the band are in the trombone section. What fraction ofthe students in the band are in either the trumpet section or thetrombone section?
[EX A]:
0.8