Let's begin by listing out the information given to us:
There are four students: n = 4
Number of students to be selected: r = 2
To calculate the combination of 2 students to be chosen, we use:
Therefore, there 12 possible combinations from these
Answer:3.81 centimeters
Step-by-step explanation:All you have to do is to convert inches into centimeters
So 1 inch=2.54cm
Therefore 1.5inches=(1.5/1)×2.54cm
=3.81cm
The average speed is given by:
average speed=(total distance)/(total time)
total time for the first 30 miles was:
time=distance/speed
=30/30
=1 hr
total time for the remaining 30 miles
=30/60
=0.5
hence the average speed will be:
speed=(30+30)/(1+0.5)=60/1.5=40 miles per hour
Answer:
98
Step-by-step explanation:
147/3=49x2=98
