Multiples of 3 and of 5
Difficulty: Easy · Topics: Discrete Mathematics, Sets, Counting
A=\x : x<41,\ x=3k,\ k∈mathbbN^+\
B=\x : x<41,\ x=5k,\ k∈mathbbN^+\
How many elements does the set Acup B have?
Difficulty: Easy · Topics: Discrete Mathematics, Sets, Counting
A=\x : x<41,\ x=3k,\ k∈mathbbN^+\
B=\x : x<41,\ x=5k,\ k∈mathbbN^+\
How many elements does the set Acup B have?