Question

Can somebody help me, thank you! (:

Answer 1

if you have a set A and you have a set B ...and you have to find set AUB then just unite both the sets eliminating the common terms
so your set will be AUB=(1,3,5,7,9,10,11,13,15,17,19,20,21,23,25,27,30,31)

Answer 2

@Samxoxo clear?

Answer 3

are you sure that's the answer? it seems very long...

Answer 4

@chihiroasleaf can you help with this please, just to double check that ghazi's answer is correct? (:

Answer 5

i am sure...it is just union of both the sets

Answer 6

@ghazi you missed the '29' in the S U C
and the question ask the number of elements in S U C, so we just need to count the number of element in S U C, and if I don't do a mistake, it's 19
is it clear @Samxoxo ?

Answer 7

no, I'm confused

Answer 8

yes i forgot 29...@Samxoxo just unite the elements of both the sets...

Answer 9

so what would the final answer be?

Answer 10

19
you can read this to learn about union of sets
http://www.basic-mathematics.com/union-of-sets.html

Answer 11

so the answer is just the number 19?

Answer 12

yes.., cause you are asked 'how many elements are in the set S U C ?'