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16 de Abril, 2012 · General

preguntas tipo icfes

1. En la clinica de nutricion se estan tratando a 115 pacientes. De ellos 80 tienen problemas de alergias a ciertos alimentos y 40 tienen problemas de sobrepeso. si 25 pacientes presentan ambos problemas cuantos pacientes tienenunicamente problemas de alergias ?
A) 15
b) 20
c) 55
d) 95

Respuesta : c

2- El dia del nino la caridad llevo al orfanato regalos para los ninos. del total de 100 ninos que acudieron al acto, a 45 de ellos les dieron una pelota. ac70 les dieron un yoyo y a 25 les tocaron los dos regalos. Cuantos ninos no recibieron regalo?
a) 20
b) 10
c) 45
d) 90

Respuesta :b

3- al realizar las pruebas de control de calidad en la fabrica de circuitos electricos, se encontraron un total de 10 circuitos defectuosos. de estos 7 tenian filamentos rotos. uno de estos tenia el filamento roto y la conexion defectuosa, pero los alambres estaban bien. Uno tenia la conexion defectuosa y un alambre roto pero los filamentos estaban bien. 2 tenian filamentos rotos y alambres rotos pero las conexiones estaban bien, 3 tenian solamente los filamentos rottos y 2 tenian solo la conexion defectuosa
Cual es el # de circiutos defectuosos debido a las 3 fallas?
A) 3
b) 2
c) 5
d) 1

Repuesta :d

4- En una escuela secundaria al final del semestre se obtuvieron los siguientes datos de 1600 estudiantes: 801 aprobaron matematicas, 900 aprobaron fisica, 752 aprobaron quimica, 435 aprobaron matematicas y fisica, 398 aprobaron matematicas y quimica, 412 aprobaron fisica y quimica, 310 aprobaron matematicas quimica y fisica.
indicar cuantos de estos estudiantes aprobaron solamente 1 materia
a) 315
b) 625
c) 893
d) 82

Repuesta :c

Respuesta :

5.Diego le cuenta a Andres que ascendió una montaña de 4km de altura por 2h a velocidad constante y que la descendió en 1h también y a velocidad constante.

Diego afirma, que para hacer el mismo recorrido en el mismo tiempo , si fuera a la misma velocidad tanto en el ascenso como en el descenso , esta seria de 3km/h.

Esta afirmación es:

a) falsa, puesto que si Diego hiciera el mismo recorrido a esta velocidad ,

emplearía un tiempo menor

b) verdadera , ya que es el promedio de los datos que se obtienen,

de las velocidades de ascenso y descenso.

c) verdadera, porque para hallar esta velocidad es suficiente con considerar,

las velocidades empleadas tanto en el ascenso como en el descenso .

d) falsa, ya que caminando a esta velocidad Diego si hubiese podido hacer

el mismo recorrido

Respuesta: A

6.La población de un país aumentó en un promedio del 2% por año entre 2000 y 2003. Si la población de este país fue de 2 000 000 el 31 de diciembre de 2003, entonces la población de este país el 1 de enero de 2000, al millar más cercano habría sido

a) 1.846.000

b) 1.852.000

c) 1.000.000

d) 1.500.000

Respuesta: A

7.f es una función cuadrática cuya gráfica es una parábola que abre hacia arriba y tiene un vértice en el eje x. La gráfica de la nueva función g definida por g (x) = 2 - f (x - 5) tiene un rango definido por el intervalo .

a)(-5+ infinito)

b) (2+ infinito)

c) (- infinito 2)

d) (- infinito 0)

Respuesta: C

8. Cuando un cojinete de bolas metálico se coloca dentro de un recipiente cilíndrico, de radio 2 cm, la altura del agua, dentro del recipiente, aumenta por 0.6 cm. La radio, a la décima parte de un centímetro, del rodamiento de bolas es.

a)1 cm

b)1.2 cm

c)2 cm

d)0,6 cm

Respuesta: B

9. Los resultados del examen de todos los 500 alumnos se registraron y se determinó que estos resultados se distribuyen normalmente. Si la calificación de Jane es de 0,8 desviación estándar por encima de la media, ¿cuántos, a la unidad más cercana, los estudiantes obtuvo calificaciones por encima de Jane?

a) 394

b) 250

c) 400

d) 106

Respuesta: D

10.Las gráficas de las dos ecuaciones y = ax ² + bx + c, y = A x ² + B x + C, de tal manera que una y A tienen signos diferentes y que las cantidades b ² - 4 ac, y B ² - 4 AC son tanto negativo,

a) Se cortan en 2 puntos

b) Intersectan en 1 punto

c) No se cortan

d) Ninguna de las anteriores

Respuesta: C

LORENA PASCAGAZA 11-03

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