A school bus has 25 seats, with 5 rows of 5 seats. 15 students from the first grade and 5 students from the second grade travel in the bus. How many ways can the students be seated if all of the second-grade students occupy the first row?a. 25P20
b. 5P5 × 20P15
c. 5C5 × 25C14
d. 5P5 × 15P15
e. 5P5 × 25C15
Answers
Answer:
The correct option is b.
Step-by-step explanation:
It is given that the school bus has 25 seats, with 5 rows of 5 seats.
The number of students from the first grade is 15 and the number students from the second grade is 5.
The formula to arrange r items in n places is
The number of seats in first row is 5 and the number students from the second grade is 5. So, the total number of arrangement is
The number of seats except first row is 20 and the number students from the first grade is 15. So, the total number of arrangement is
The total number of ways the students can be seated if all of the second-grade students occupy the first row is
Therefore the correct option is b.
Answer:
b
Step-by-step explanation:
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Related Questions
The standard diameter of a golf ball is 42.67 mm. A golf ball factory does quality control on the balls it manufactures. Golf balls are randomly measured to ensure the correct size. One day, an inspector decides to stop production if the discrepancy in diameter is more than 0.002 mm. Which function could represent this situation?A. f(x ) = x – |42.67| B. f(x ) = |x| – 42.67 C. f(x ) = |42.67 – x| D. f(x ) = 42.67 – |x|
36 – 0.0048 = ? A. 35.9952 B. 35.1520 C. 35.0048 D. 36.0048
INSERT TWO RATIONAL NUMBERS BETWEEN 2 AND 3. How to find them?
Solve for u. -24 = u ÷ 6 U=
Answers
Answer:
n = -12
Step-by-step explanation:
hope it helped , darling .
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Answers
Answer:4.5
Step-by-step explanation:
have?
Answers
Answer:
Well, she must have 30 dimes and 1 nickel.
Step-by-step explanation:
Answers
From what we know about rounding, we will see that the possible total amount of money is given by the inequality:
£14.75 ≤ M ≤ £16.23
How does rounding works?
When we round a given number to a given place, what we need to do is look at the number at the right of that place.
- If the number is 5 or larger, we round up.
- If the number is 4 or smaller, we round down.
So we know that Jon, to the nearest pound has £9.
- This means that he can have a minimum of £8.50
- And a maximum of £9.49
We know that to the nearest £0.50, so we look at the half of 0.5, which is 0.25, for example:
1.23 would be rounded to 1.
1.25 would be rounded to 1.50
1.27 would be rounded to 1.50
Ellie has £6.50, then she has:
- A minimum of £6.25
- A maximum of £6.74
So, adding the minimums and maximums together we get:
minimum = £8.50 + £6.25 = £14.75
maximum = £9.49 + £6.54 = £16.23
So the possible total amount of money, defined by M, is in the interval:
£14.75 ≤ M ≤ £16.23
If you want to learn more about rounding, you can read:
Answer:
£16.25
Step-by-step explanation:
Jon. £9 to nearest pound so £9.50
Ellie. £6.50 to the nearest 50p so £6.75. £
9.5+6.75 = £16.25
Answers
Answers
Hello ;)
244÷5= 48,8
So the result is: $48,8