Question

Given two sets of numbers, P = {2, 4, 5, 9, 13, 21} and F = {2, 4, 5, 7, 11, 13, 17}, which one of the following sets is equal to P (big u) F?

A. {2, 3, 5, 13}
B. {2, 2, 4, 4, 5, 5, 7, 8, 11, 13, 13, 17, 21}
C. {2, 21}
D. {2, 4, 5, 7, 9, 11, 13, 17, 21}
E. {1, 2, 3, 5, 8, 12, 19, 26, 38}

Answer 1

define what the big U tells us about the setup

Answer 2

\[p \cup f\]

Answer 3

Thats what it looks like

Answer 4

@amistre64

Answer 5

thats what it looks like yes. what does the U tell us? it refers to some specific action that we can do.

Answer 6

Nevermind i got the answer. It was d
Can you help with a different question?
@amistre64

Answer 7

possibly

Answer 8

You draw two cards from a well-shuffled deck of 52 cards. After you draw the first card, you do not replace it in the deck. The probability of drawing the ace of diamonds on your first draw is 1/52.
What is the probability of P(get king of clubs on second draw | get ace of diamonds on first draw)?

A. 1/51
B. 1/26
C. 2/51
D. 1/52

Answer 9

@amistre64

Answer 10

first, which one would you guess

Answer 11

Maybe 1/51 @amistre64

Answer 12

thats what im thinking to. if youve already drawn a card, and its not a king club, then there are 51 possibilities left, and 1 out of them is correct.

1/51

Answer 13

Thank you

Answer 14

now, there is a math way to do it:
\[P(B|A)=\frac{P(B\cap A)}{P(A)}\]

Answer 15

\[\frac{\cancel{1/52}~*~1/51}{\cancel{1/52}}\]