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Brilliant_brown [7]
4 years ago
12

Let n be a positive integer. We sample n numbers a1, a2,..., an from the set {1,...,n} uniformly at random, with replacement. We

say that picks i and j with i < j are a match if ai = aj.
What is the expected total number of matches?

Mathematics
1 answer:
zepelin [54]4 years ago
4 0

Answer:

Step-by-step explanation:

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Help please it geometry plz
kotegsom [21]

Answer and Step-by-step explanation:

1. square and 20 ft because each side is 5 ft and 5+5+5+5=20

2. triangle and 25 ft because 12+5+8=25 ft

3. trapezoid but Im not sure what the side lengths are for that one so i dont know what the perimeter is

4. Parallelagram and the same as what happened with number three

5. hexagon and 8+8+8+8+8+8= 48 ft

8 0
3 years ago
Need help pzzzzzzz 9.
Mrac [35]

Answer:

it should be 36 because if u substitute 36 as x and then solve as an addition equation the answer should come out as 180 degrees

8 0
3 years ago
If Ben bikes 3 miles and then bikes 1,000 yards back toward his starting point, how many yards is Ben from his starting point?
podryga [215]
4280 because their is 5280 yards in 3 miles and 5280-1000=4280
hope this helped
5 0
4 years ago
Calculate the couple moment acting on the steering wheel, and express it as a Cartesian vector.
IRISSAK [1]

The equation for resolving couples will come in place

Fcos\theta=0\\\ Fsin\theta =0

Using the unit vectors by i and j along the x-axis and the y-axis you'll express it as a Cartesian vector.

<h3>Couple moment and Cartesian vector</h3>

Couple moment:This looks at the product of the forces acting on a body( in this context a steering wheel ) by the perpendicular distance that exist amidst the forces.

Cartesian vector:this is the representation of unit vectors by i and j along the x-axis and the y-axis, respectively.

Therefore, in calculating the <em>couple</em> moment t acting on the steering wheel, the equation for resolving couples will come in place

Fcos\theta=0\\\ Fsin\theta =0

Using the unit vectors by i and j along the x-axis and the y-axis you'll express it as a Cartesian vector.

More on Cartesian  Co-ordinate

brainly.com/question/4511664

7 0
2 years ago
6cm<br> 5cm<br> 20cm<br> 4cm<br> 5cm<br> 4cm<br> 12cm<br> 6cm<br> 4cm
dusya [7]

Answer:

SA = 788cm^2

Step-by-step explanation:

<u>pink one:</u>

length- 5

width- 6

height- 20

surface area- 500

<u>purple one:</u>

length- 4

width- 6

height- 12

surface area- 288

<u>total surface area:</u>

500 + 288 = 788

SA = 788cm^2

GOOD LUCK!!!! You'll do amazing <3

4 0
2 years ago
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