Ishiiwuubviz
Answered

7. If A =(2, 4, 6, 8, 10) and B =(3, 6, 9, 12), find n (AN B).

A. 0
B. 2
C. 6
D. 10

9. Which expression gives the number of ways of arranging five different books in a shelf?

A. (5–1)!
B. 5!
C. 5 x 4
D. 5 x 5

12. Which formula will be used in the following situation. Chose 2 girls and 3 boys in forming a group of 5 from a class of 40 students.

C(n, r) = n!
-------
(n-r)!r!

B. P(n,r)= (n-r) = n
——
(n–r)!

C. n!=n• (n-1)•(n-2)•...

D. P = (n - 1)!


will you help me?





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Sagot :

LalaD3viz

Answer:

7. c

9. c

10. a

Step-by-step explanation:

for number 7 if you mean A intersection B you need to find something in common and that is 6.

no. 9 just use 5*4 and no. 12 is combination.