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Combinatorics: comprobación de requisito previo

Enseñamos conceptos difíciles con las palabras más simples posibles. Vamos a corroborar que conozcas los términos y las ideas que se necesitan. Este curso es el correcto si obtienes al menos 80% en esta prueba, pero menos del 70 % de la prueba de exención. Esta prueba debería ser muy fácil para ti, solo comprobaremos que sepas lo básico para entender.

Tiempo restante:

10:00

a = 2^b c

and

b = 3

and

c = 5,

what is

A?

13

30

40

45

256

Calculate:

\frac{6 \times 5 \times 4}{3 \times 2 \times 1}

\displaystyle \frac{5}{2}

15

20

80

720

All but one of these rings of 6 beads can be obtained from the others by rotating or flipping over the ring. Which is the unusual one?

When buying a certain model of phone, there are

3

colors to choose from, and

3

different amounts of storage to choose from. How many different combinations are there for that phone model?

6

9

27

64

720

Jenny has

3

skirts,

2

pants, and

4

shirts. How many ways can she create an outfit with one of the shirts, and either a skirt or pant?

8

9

12

20

24

Everybody in a certain middle school takes French, Spanish, or both. The French teacher has a total of

90

students, and the Spanish teacher has a total of

110

students. There are

20

students in both languages. How many students are at the school?

180

190

200

210

220