Answer:
a) The CDF of X/Y is calculated as:
for 
for 
Note: Z = X/Y
b) Probability that A finishes before B = 1/3
Step-by-step explanation:
For clarity and easiness of expression, this solution is handwritten and attached as a file. Check the complete solution in the attached file.
279 butterflies if I’m correct. 236+128=364 and 364-85 is 279.
Answer:
65 people.
Step-by-step explanation:
We have to work backwards.
We end with 63 people, and at the stop we lost 19 people and gained 17.
; if x = # people at the beginning
There were 65 people on the train to begin with.
Answer:
not sure
Step-by-step explanation:
Hi!
So if you know the probability of choosing a red marble in that given jar is 1/4, you can then figure out what the probability of not choosing a red marble, or choosing a blue marble, is. That probability would be called the complement of 1/4, and what would be added to it to make 1. In this case, it would be 3/4.
Since 27 of the marbles are blue, and the chance of drawing a blue marble is 3/4, we can then say 27 = 3/4 of the jar. Now the easier way is to find what 1/4 then equals and add it up. Since 1/4 is 1/3 of 3/4, we can see what 1/3 of 27 is to find what 1/4 of the marbles in the jar is.
1/3 • 27 = 9.
So if we add 9 and 27 together, that's the total number of marbles in the jar. 27 + 9 = 36.
There are 36 marbles in the jar.
