Answer:
We are given that random sample of identical model sports cars are normally distributed with mean of 120000 miles and standard deviation of 30000 miles.
We have to find approximately how many sports cars will have less than 150000 miles on the odometer.
We will first find the z-score for 150000.
Now using the standard normal table, we have:
Now there will be approximately sport cars will have less than 150000 miles on the odometer.
Answer:
D.
Step-by-step explanation:
We have been given that a bag contains x blue chips and y red chips. The probability of selecting a red chip at random is 3/7. We are asked to find the .
Since we are told that probability of selecting a red chip at random is 3/7, so red balls are 3 and total balls are 7:
Since total balls are 7, so we will get:
Upon substituting in expression
, we will get:
Therefore, the value of is
and option D is the correct choice.