Question

please help mee

Answer 1

Several concepts are involved in this problem. First, you need to consider your 'sample space.' How many cards are there in a deck? Of those, how many are kings? how many are queens? What is the probability that the first card you select is a king? a queen?

Now suppose you put that card back and re-shuffle your deck of cards. Again, what is the probability that the next card you draw is a king or queen?

If you replace every card that you draw, before drawing another card, then each such event is independent of every other such event.

What is the formula for the joint probability of two independent events (e. g., the probability of ' A OR B ')?

Answer 2

formula of two joint events is p(a) + p(b)
and i think total card are 52 and each of those are 13
don't know much about cards:(

Answer 3

All of that is correct.
Suppose I give you a new deck of 52 cards and ask you to shuffle them.
How many kings are in that deck?
What are the chances that if you draw one card at random from this deck, it'll be a KING?

Answer 4

there are 4 queen and 4 king

Answer 5

@phi can you help me ???

Answer 6

there are 4 queen and 4 king
= 8 "good cards"

First, what is the probability of choosing a good card on the first draw ?

Answer 7

48 ??

Answer 8

4/13 i got this i did 8/52 and reduce

Answer 9

yes, 8/52 which simplifies to 2/13

Answer 10

ohh oops yeah my bad

Answer 11

to answer the full question I draw a tree

Answer 12

is that 8/51 or 52

Answer 13

Let me think about it.

Answer 14

The choices you give only work if you drew one card, checked if it was a king or queen, put it back in the deck, shuffled and tried again. in other words, *with replacement*
the answer would be 2/13 +2/13= 4/13

if we picked two cards at the same time, we would not get a nice simple fraction like those listed.

Answer 15

2/13 right answer :)

Answer 16

i did 2/13 and that mark me right

Answer 17

we have 4 kind and 4 queen so probability of king and queen card out of 52 is 4/52 + 4/52 and then add 8/52
???

Answer 18

You should ask your teacher about this one.
2/13 is the chances of picking a king or queen with *one card selected*
the questions says, "two cards selected". So that is probably a typo.

Answer 19

yes that is a good point they said two cards

Answer 20

i will ask this :)

Answer 21

thanks , thank you :)