Answer:
Step-by-step explanation:
Answer: 0.86 of the exam scores are between 68 and 77.99 points
Step-by-step explanation:
Since the set of computer science exam scores are normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = computer science exam scores .
µ = mean score
σ = standard deviation
From the information given,
µ = 71.33 points
σ = 3 points
We want to find the proportion of the exam scores are between 68 and 77.99 points. It is expressed as
P(68 ≤ x ≤ 77.99)
For x = 68,
z = (68 - 71.33)/3 = - 1.11
Looking at the normal distribution table, the probability corresponding to the z score is 0.13
For x = 68,
z = (77.99 - 71.33)/3 = 2.22
Looking at the normal distribution table, the probability corresponding to the z score is 0.99
P(68 ≤ x ≤ 77.99) = 0.99 - 0.13 = 0.86
Answer: second one
13 pint = 1.625 gallons, so 1.625 gallons =$12.74.
3 gallons = 24 pint. so 24 pints = 30.48
now if we divide 13 and 24.= 1.84615384615
3 divided by 1.625 =1.84615384615
This is equaled the same now we need to divide the money so 30.48 divided by 12.74 = 2.39246467818 and now you got 2.39 so the answer is the second one
Step-by-step explanation:
