3/2 because you divide both by 2
To find the expected value of your gain in each prize, subtract the price of the ticket from the prize:
If the prize is $500: $500 - $2 = $498
If the prize is $250: $250 - $2 = 248
If the prize is $160: $160 - $2 = $73
But if you did not win any cash prize, you do not have any gain because
0 cash prize - $2 ticket = -$2 which is a loss
The answer is 73 because , 5+8=13 black times 4=52 red so
8 blue + 13 black + 52 red = 73 markers in all
Answer:

Step-by-step explanation:
Number of red balls = 4
Number of green balls = 6
Total number of balls = 6+4 =10
Probability of drawing a green marble is given as
⇒ 
⇒ 
The ball is replaced after drawing.
Probability of drawing a green ball a second time will be:
⇒ 
⇒ 
Thus, probability of drawing 2 green balls with replacement can be given as:
⇒ (Probability of drawing a green marble)
(Probability of drawing a green ball a second time)
⇒ 
⇒ 
Simplifying fraction by dividing numerator and denominator by their GCF.
⇒ 
⇒
(Answer)
S+a=150
3s+8a=1000
a=-s+150
3s-8s+1200=1000
-5s=-200
s=40
a=110
40 student and 110 adult tickets were sold