- A card is selected at random from a standard pack of playing cards and then
replaced. This is done 1,040 times.
How many times would you expect to get
the following cards:
(a) A red card?
(b) A King?
(C) The Queen of hearts?​

Step-by-step explanation:

a ). red cards = 26

then probability is = no. of outcomes / total no. of outcome

p ( red card ) = 26 / 1040

p ( red card ) = 1 / 40

b ) kings = 4

p ( kings ) = 4 / 1040

p ( kings ) = 1 / 260

c ) queen of hearts = 1

p ( queen of heart ) = 1 / 1040

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)