Can u answer number 20 only pls with explaining

[tex]\text{Hello there!}\\\\\text{To find your average, you would add all of the numbers together, then}\\\text{divide by how many there are}\\\\\text{The times are: 1.23, 1.04, and 1.18}\\\\\text{Add them together and divide by 3}\\\\1.23+1.04+1.18=3.45\\\\3.45\div3=1.15\\\\\boxed{\text{Average time: 1.15 minutes}}[/tex]