<span>Answer
48/9.23=0.052 </span>
First the number of ways of selecting 3 students out of 8 is 8*7*6/(3*2*1)=56.
There are 6 ways of arranging the officers, so the total number of ways is 6*56=336
You need to add all of them up then devied by how many there are
38.1 seconds I believe simply divide 4m/s into 152.4 m and you will have 38.1 seconds
