a local retail outlet found that 65 out of a sample 133 customers purchased more than $50 in merchandise in a single trip. Based on these sample values, how many customers out of 2500 would be expected to spend more than $50 in a single trip?
If you are dealt two cards successively(without replacement) from a standard 52-card deck, find the probability of getting a spade on the first card and a diamond on the second.
2007-05-17 07:48:42 · 4 answers · asked by kjabri 2 in Science & Mathematics ➔ Mathematics
Just multiply 2500 by 65/133
Second one:
13/52 * 13/51
2007-05-17 07:51:17 · answer #1 · answered by Dr D 7 · 1⤊ 0⤋
For the first one you would use 65/133=x/2500, cross multiply, and then solve for x
For the second one the chance of you getting a spade is 13/52 and the chance of getting a diamond would be 13/51 so you would multiply the two.
2007-05-17 14:53:45 · answer #2 · answered by Meggie Beth 3 · 0⤊ 0⤋
65/133=x/2500
x = 65*2500/133 = 1222
Probability of spade as 1st card = 1/4
Probability of diamomd as 2nd card = 13 /51
Total probability = (1/4)(13/51) = 13/204
2007-05-17 14:58:00 · answer #3 · answered by ironduke8159 7 · 0⤊ 0⤋
65 .. .. M .........M 133= 65(2500) ........ m 133=162,500
---- X -------- ... ...........+++++++======= ----- .. -----------
133 .. 2500 ................................................. o....... . 133 .. 133
M=1222
51 Because you all ready pulled a card out
13 .. 13
---- X ----
52 ... 51 15.692308
pay no attion to the dots or + =
2007-05-17 15:07:05 · answer #4 · answered by gdaly7 3 · 0⤊ 0⤋