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Alik [6]
3 years ago
8

Benny gets paid $500 every two weeks. After his paycheck is deposited, he has to pay his cell phone bill of $30 and buy a birthd

ay gift for his girlfriend. If Benny has $390 left in his account, how much did he spend on the gift?
Mathematics
2 answers:
aliina [53]3 years ago
7 0

Answer:

$80

Step-by-step explanation:

500-390-30

$80

zhenek [66]3 years ago
4 0
500-30= 460
460-390=70
Benny spend 70$ on the gift
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Answer:

no error was made

Step-by-step explanation:

5x- 1/5*(20x +5) =9

distribute

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combine like terms

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6 0
4 years ago
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En la final de un concurso escolar de
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Usando la distribución hipergeométrica,  la probabilidad de que los alumnos del colegio A obtengan los dos premios (no hay empates), es: 0.2 = 20%.

<h3>¿Qué es la fórmula de distribución hipergeométrica?</h3>

La fórmula es:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}

C_{n,x} = \frac{n!}{x!(n-x)!}

Los parámetros son:

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  • N es el tamaño de la población.
  • n es el tamaño de la muestra.
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Los valores de los parámetros son:

N = 6, k = 3, n = 2.

La probabilidad de que los alumnos del colegio A obtengan los dos premios (no hay empates), es P(X = 2), por eso:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}

P(X = 2) = h(2,6,2,3) = \frac{C_{3,2}C_{3,0}}{C_{6,2}} = 0.2

Puede-se aprender más a cerca de la distribución hipergeométrica en brainly.com/question/24826394

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denpristay [2]

Answer:

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Step-by-step explanation:

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