I am not sure on how to do this however here is a link with information thst will be able to help you around this subject.i hope this helps
https://www.bbc.com/bitesize/guides/z8k887h/revision/1
A. 2.5 minutes
b. 0.4 laps
c. 100 minutes
Answer:
The probability is 2/9
Step-by-step explanation:
Here , we want to find the probability of getting a violet ball first and a pink ball secondly if the violet ball is replaced
probability = number of balls of same color/total number of balls
The total number of balls = (2 + 4) = 6 balls
Probability of selecting a violet = 2/6 = 1/3
Probability of selecting a pink afterwards with replacement = 4/6 = 2/3
So the probability of selecting the balls in that order will be;
1/3 * 2/3 = 2/9
Average speed = (total distance traveled)/(total travel time)
= (total distance)/(time of 1st journey<span> + </span>time of 2nd journey<span> + </span>time of 3rd journey)
Let d = the distance between Town A and Town B
<span>So, total distance traveled = </span>3d
Time = distance/speed
time of 1st journey = d/x
time of 2nd journey = d/y
time of 3rd journey = d/z
<span>Total time = </span>d/x<span> + </span>d/y<span> + </span>dz
<span>To simplify, rewrite with common denominator: </span>dyz/xyz<span> + </span>dxz/xyz<span> + </span>dxy/xyz
So, total time = (dyz + dxz + dxy)/xyz
Average speed = (total distance)/(total time)
<span>= </span>3d/[(dyz + dxz + dxy)/xyz]
= (3dxyz)/(dyz + dxz + dxy)
<span>Divide top and bottom by d to get: (3xyz)/(yz + xz + xy)</span>
