Carla bought a digital camera that cost $91.98.She also bought two identical memory cards and a case for the camera. The camera
cost six times as much as the case. She paid $127.35 including sales tax of $6.06. What was the cost of each memory card? PLEASE HELP I tried solving it I don't understand
2 answers:
You might be interested in
Greeting to you! My name is Cecille and I’m here to answer that question
For more explanation, please see the attachment
For more explanation, please see the attachment
Answer:
Step-by-step explanation:
Given
a)
we know that
therefore
on integrating we get
c=(1/6640)
b)
on doing the integration we get
=0.37349
c)
marginal density of X is
on doing integration we get
f(x)=(4x+3)/3320 ; 0<x<40
marginal density of Y is
on doing integration we get
d)
solve the above integration we get the answer
e)
solve the above integration we get the answer
f)
Two variables are said to be independent if there jointprobability density function is equal to the product of theirmarginal density functions.
we know f(x,y)
In the (c) bit we got f(x) and f(y)
f(x,y)cramster-equation-2006112927536330036287f(x).f(y)
therefore X and Y are not independent