Answer:
Step-by-step explanation:
Given that the probability of a customer arrival at a grocery service counter in any one second is equal to 0.3
Assume that customers arrive in a random stream, so an arrival in any one second is independent of all others.
i.e. X the no of customers arriving is binomial with p = 0.3 and q = 1-0.3 =0.7
a) the probability that the first arrival will occur during the third one-second interval.
= Prob that customer did not arrive in first 2 seconds * prob customer arrive in 3rd sec
= 
b)  the probability that the first arrival will not occur until at least the third one-second interval.
Prob that customer did not arrive in first two seconds *(Prob customer arrives in 3rd or 4th or 5th.....)
=
The term inside bracket is a geometric infinite progression with common ratio - 0.7 <1
Hence the series converges
Prob =
 
        
             
        
        
        
Answer:
24 square units
Step-by-step explanation:
 
        
             
        
        
        
Answer: Ashley spent $18.70 and the friend spent $17.16
Step-by-step explanation:
Original cost of Ashley's meal = $ 15.85
tip left = 18% of 15.85
that is 
tip left = 0.18 x 15.85 = $2.85
All together, Ashley will pay
$15.85 + $2.85
= $18.70
The friend's original cost = $14.30
tip = 20% of 14.30
= 0.20 x 14.30
= $2.86
All together , the friend will pay
$14.30 + $2.86
=$17.16
Therefore:
Ashley spent $18.70 and the friend spent $17.16
 
        
             
        
        
        
Answer:
no i dont think i will
Step-by-step explanation:
 
        
             
        
        
        
Answer:
See below 
Step-by-step explanation:
a). 3y-6x=48
 soln
 or, 3xy=48
 or, xy=48÷3
 or, xy=32,,
b). y=3x+11
 soln
 or, y=13x
 or, xy=13,,