Question

In the draw of a card from a deck of ordinary playing cards,find the probability that the card is a 7 or a club ?

Answer 1

@hartnn

Answer 2

how many 7 are there in a deck of ordinary playing cards?

Answer 3

4

Answer 4

I GUESS

Answer 5

yup.

Answer 6

how many clubs are there ?

Answer 7

13

Answer 8

I GUESS

Answer 9

right.

Answer 10

and total cards ?

Answer 11

you 'GUESS' a lot :)

Answer 12

13*4=52+2 JOKERS =54 I GUESS @Zarkon :D

Answer 13

usually don't include jokers

Answer 14

don't count joker.

Answer 15

Ok 52

Answer 16

so probability is defined as favourable / total
so, can u tell me the probability of getting 7 ?

Answer 17

4/52

Answer 18

right, same way find, probability of setting a club.
so now you let P(S) = probability of getting 7
let P(C) = probability of getting club
you want P(S OR P)
u know the formula ?

Answer 19

*getting

Answer 20

Actually we will have to count it as 12 now because we dont want to repeat the 7 because its already been taken if i am not wrong and i dont really know how to do this so it would be better to guide me to the answer :)

Answer 21

ok, how many 7 'and' club cards are there ?

Answer 22

In total 16

Answer 23

because we are not repeating the 7 of clubs

Answer 24

P(S OR C) = P(S)+P(C)-P(S and C)
thats why i asked you 7 'and' club cards.

Answer 25

Ok Using this 13+4-1=16

Answer 26

ok, those are probabilities, so u get
13/52 +4/52- 1/52
ok?
which is
16/52 = ?

Answer 27

ok

Answer 28

so u get P(card is a 7 or a club) = 16/52 = ?

Answer 29

4/13

Answer 30

is the answer

Answer 31

yup

Answer 32

Thanks :)