Answer: P(x < 0.285) = 0.0668
Step-by-step explanation:
Since the diameters of pencils produced by the machine are normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = diameters of pencils produced .
µ = mean diameter
σ = standard deviation
From the information given,
µ = 0.30 inches
σ = 0.01 inches
The probability that the diameter of a randomly selected pencil will be less than 0.285 inches is expressed as
P(x < 0.285)
For x = 0.285
z = (0.285 - 0.30)/0.01 = - 1.5
Looking at the normal distribution table, the probability corresponding to the z score is 0.0668
Answer:
im sorry if i got this wrong but 89.5
Step-by-step explanation:
Answer:
x = 28 or x equals twenty eight
Step-by-step explanation:
5x = 140
Divide five from each side.
x = 28
Then you get x equals twenty eight.