Answer:
The number of students who scored more than 90 points is 750.
Step-by-step explanation:
Quartiles are statistical measures that the divide the data into four groups.
The first quartile (Q₁) indicates that 25% of the observation are less than or equal to Q₁.
The second quartile (Q₂) indicates that 50% of the observation are less than or equal to Q₂.
The third quartile (Q₃) indicates that 75% of the observation are less than or equal to Q₃.
It is provided that the first quartile is at 90 points.
That is, P (X ≤ 90) = 0.25.
The probability that a student scores more than 90 points is:
P (X > 90) = 1 - P (X ≤ 90)
= 1 - 0.25
= 0.75
The number of students who scored more than 90 points is: 1000 × 0.75 = 750.
Compound interest formula:
Amount = starting value x ( 1+ interest rate/compounds per year)^(compound per year x number of years)
Amount = 12,000,000 x (1+ 0.10/1)^(1x5)
Amount = 19,326,120.00
Answer:b
Step-by-step explanation: i thinks its b
Answer:
Price after sale: $4.04
$0.71 saved
Step-by-step explanation:
To solve quadratics, the most correct and effective way, in my opinion, is the quadratic formula:
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Plugging it in, we get:
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So the final answer is:
and
