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Probability Skills Assessment

Authored by EMMANUEL TORRES

Mathematics

7th Grade

Probability Skills Assessment
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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Si una bolsa contiene 5 canicas rojas, 3 canicas azules y 2 canicas verdes, ¿cuál es la probabilidad de sacar una canica roja?

4/10

5/10 o 1/2

3/10

2/10

Answer explanation

The probability of drawing a red marble is 5 out of the total 10 marbles, so the correct answer is 5/10 or 1/2.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

¿Cuál es la probabilidad de sacar un número par al lanzar un dado de seis caras?

1/2

1/5

1/4

1/3

Answer explanation

The probability of rolling an even number on a fair six-sided die is 1/2 because there are 3 even numbers (2, 4, 6) out of a total of 6 possible outcomes.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Si giras un girador con 4 secciones iguales numeradas del 1 al 4, ¿cuál es la probabilidad de aterrizar en un número impar?

1/3

1/2

2/3

1/4

Answer explanation

The probability of landing on an odd number is 2 out of the total 4 sections, which simplifies to 1/2. Therefore, the correct answer is 1/2.

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Si tiras un dado justo de seis caras dos veces, ¿cuál es la probabilidad de sacar un 2 en la primera tirada y un 4 en la segunda tirada?

1/18

1/36

1/6

1/12

Answer explanation

The probability of rolling a 2 on the first roll is 1/6, and the probability of rolling a 4 on the second roll is also 1/6. Therefore, the combined probability is 1/6 * 1/6 = 1/36.

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Una bolsa contiene 4 canicas rojas y 5 canicas azules. Si sacas una canica, no la reemplazas, y luego sacas otra canica, ¿cuál es la probabilidad de sacar 2 canicas azules?

2/9

5/18

4/9

3/9

Answer explanation

The probability of drawing the first blue marble is 5/9. After not replacing it, the probability of drawing a second blue marble is 4/8. Multiplying these probabilities gives 5/18.

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Si lanzas una moneda y tiras un dado justo de seis caras, ¿cuál es la probabilidad de obtener cara en la moneda y sacar un 3 en el dado?

1/12

1/3

1/6

1/2

Answer explanation

The probability of getting heads on the coin is 1/2, and the probability of rolling a 3 on the die is 1/6. Multiplying these probabilities gives 1/12, the probability of both events occurring together.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Si giras un girador con 5 secciones iguales numeradas del 1 al 5, ¿cuál es la probabilidad de aterrizar en un número mayor que 3?

0.4

0.2

0.8

0.6

Answer explanation

The probability of landing on a number greater than 3 (4 or 5) out of 5 equal sections is 2/5 or 0.4, making it the correct choice.

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