Question 1058381: Q.1 A biased die is rolled 500 times and the number 6 came up 83 times.
a) What is the experimental probability of a 6 occurring?
b) What are the odds of the number 6 coming up in this experiment?
c) If the odds that a three will come up 12 times in 72 rolls of a die, what is probability that a three would
come up ?
Q.2 A survey of 250 homes in a neighborhood found that 160 households owned a DVD player and 140 households owned a DVD player and a PVR machine. Thirty households don’t own either of the two. What is the probability that a randomly selected household from this neighbourhood will only own a
PVR?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! I answered Q1 earlier
Q2 220 households have one or the other, because 30 households have neither.
Of the 220, 160 have a DVD player and 140 have both
Here, the probability of P(A or B)=P(A)+P(B)-P(A and B)
160+P(DVR)-140=220
P(DVR)=220-20=200
160 have DVD
200 have PVR
140 have both
Therefore, 220 have one or the other
30 have neither.
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