3 years ago

What does it mean when there are variables on top of each other in parentheses in statistics?

Mathematics

1 answer:

Ilya [14]3 years ago

4 0

It's a combination:
$\left( {{n} \atop {k}}\right)\equiv C(n,k)=\dfrac{n!}{(n-k)!k!}$

You might be interested in

If f(x) = f(x)g(x), where f and g have derivatives of all orders, show that f'' = f ''g + 2f 'g' + fg''.

Nadya [2.5K]

Differentiating once, we have

$f'(x)=f'(x)g(x)+f(x)g'(x)$

Differentiating again,

$f''(x)=f''(x)g(x)+f'(x)g'(x)+f'(x)g'(x)+f(x)g''(x)$
$f''(x)=f''(x)g(x)+2f'(x)g'(x)+f(x)g''(x)$

as needed.

5 0

3 years ago

Which represents the solution of –9.5 + 6x ≥ 42.1 using interval notation?

OlgaM077 [116]

Hello :
<span>–9.5 + 6x ≥ 42.1
6x </span>≥ 42.1 + 9.5
6x ≥ 51.6
x ≥ 51.6/6
x ≥ 8.6
using interval notation: <span>[8.6 ; +∞[ </span>

5 0

3 years ago

A salad recipe that serves 10 people requires 1 1/2 cups of celery. To serve 5 people, the amount of celery required is

Annette [7]

Well this is a one step equation, just take 1.5 cups of salad and divide it buy 2 because you are only serving half of the people.

1.5 / 2 = .75 cups of celery

8 0

3 years ago

A box contains twenty cards numbered 1 through 20. One card is to be randomly drawn from the box.

Crank

C.7/20
Hope i helped
let me know if i did not

3 0

3 years ago

Read 2 more answers

The lake commission tagged 125 fish. A week later, 200 fish were caught and 65 of these fish had tags. Estimate how many fish we

Helga [31]

Answer:

600