A trade magazine routinely checks the drive-through service times of fast-food restaurants. An 80% confidence interval that r
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There are 48639 ways for a lord to move from the bottom left to top right corner of the 8 by 8 chessboard
<h3>Further explanation</h3>The probability of an event is defined as the possibility of an event occurring against sample space.
Permutation is the number of ways to arrange objects.
Combination is the number of ways to select objects.
Let us tackle the problem.
This problem is similar to Pascal Triangle.
The Lord can move to the right or up in one way only.
We can put "1" in each box on the bottom and left to represent 1 possible movement.
To get the possibility of movement to another box, we will add the possibility of movement to the left, right, and diagonal squares as shown in Figure 1.
This process is repeated for the next box as shown in Figure 2.
Finally, after this process is repeated until the top right box, we get the results as shown in Figure 3.
There are 48639 ways for a lord to move from the bottom left to top right corner of the 8 by 8 chessboard.
<h3>Learn more</h3>- Different Birthdays : brainly.com/question/7567074
- Dependent or Independent Events : brainly.com/question/12029535
- Mutually exclusive : brainly.com/question/3464581
Grade: High School
Subject: Mathematics
Chapter: Probability
Keywords: Probability , Sample , Space , Six , Dice , Die , Binomial , Distribution , Mean , Variance , Standard Deviation
Answer:
<h2>140 minutes</h2>Step-by-step explanation:
this problem focuses on the combined work rate
both can finish the work under 63 minute
let bobby mow the lawn in x minute
Billy will then mow the lawn in x-25 minutes
Let the completed job = 1 (a mowed lawn)
we can now apply the combined work formula for the two boys as
multiplying through by x(x-25 )we have
open bracket we have
rearranging and collecting like terms we have
we can now use the quadractic formula
a= 1
b= -151
c= 1575
the first answer x= 139.72 approximately 140 minutes mins is correct for Bobby's time
let us check
we can see that the solution approximates to 1