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 place-out test
Tiempo restante:
10:00
10:00
1.
If \(a = 2^b c\) and \(b = 3\) and \(c = 5,\) what is \(A?\)
\(13\)
\(30\)
\(40\)
\(45\)
\(256\)
2.
Calculate:
\[\frac{6 \times 5 \times 4}{3 \times 2 \times 1}\]
\(\displaystyle \frac{5}{2}\)
\(15\)
\(20\)
\(80\)
\(720\)
3.
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?
4.
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?
\(6\)
\(9\)
\(27\)
\(64\)
\(720\)
5.
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?
\(8\)
\(9\)
\(12\)
\(20\)
\(24\)
6.
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?
\(180\)
\(190\)
\(200\)
\(210\)
\(220\)