All categories

4 years ago

Harry, Peter and 7 girls sit in a row. Harry can't sit in an end seat. In how many ways can they be arranged?

2 answers:

4 0

All possibilities = 9!
possibilities that harry sits at an end = 8! + 8!
possibilities that harry doesn't sit at an end = 9! - 8! -8!

vekshin14 years ago

4 0

List of all possibilities, without restrictions (ie Harry can sit in any of the 9 seats): $9!$
List of all possibilities where Harry sits on either end: $2 \cdot 8!$

Hence, list of all possibilities where Harry doesn't sit on either end: $9! - 2 \cdot 8! = 282,240$ ways.

You might be interested in

Multiply the two binomials. (3x + 5)(4x - 1) HELP PLS

AlladinOne [14]

Answer:

12x² + 17x - 5

Step-by-step explanation:

Given

(3x + 5)(4x - 1)

Each term in the second factor is multiplied by each term in the first factor, that is

3x(4x - 1) + 5(4x - 1) ← distribute parenthesis

= 12x² - 3x + 20x - 5 ← collect like terms

= 12x² + 17x - 5

5 0

3 years ago

HURRY UP!!! -100 = -t/5 - 4 please find t! (Explain aswell)

FrozenT [24]

Answer:

$t=480$

Step-by-step explanation:

Given

$-100 = -\frac{t}{5} - 4$

Required

Solve for t

$-100 = -\frac{t}{5} - 4$

Add 4 to both sides

$4-100 = -\frac{t}{5} - 4+4$

$4-100 = -\frac{t}{5}$

$-96 = -\frac{t}{5}$

Multiply both sides by -5

$-5*-96 = -\frac{t}{5} *-5$

$-5*-96 = t$

$480 = t$

$t=480$

4 0

3 years ago

359,352,345 38th term

bulgar [2K]

Answer:

38th term of AP is 100

Step-by-step explanation:

à+n-1×d

359+38-1×-7

359+(-259)

100

5 0

3 years ago

Slope of (5,3) (-4,13)

Ira Lisetskai [31]

Answer:

m= -10/9

...........

5 0

3 years ago

What is the anwser to this 5x-18-3x=4

Darya [45]

You break it down into steps. FIrst do the X's. 5x-3x=2x Then you add 18 to both sides and your equation looks like this 2x=22 Divide by 2 on both sides and x=11

5 0

3 years ago

Read 2 more answers