The 25th percentile corresponds to z ≈ -0.67.
The 90th percentile corresponds to z ≈ 1.28.
So, you can write two equations in μ and σ as here:
.. μ -0.67σ = 10
.. μ +1.28σ = 20
The solution is
.. μ ≈ 13.45
.. σ ≈ 5.11
Answer:
Yes, Beyonce will get the same solution.
Step-by-step explanation:
The given system is
2x - 3y = - 2
and
4x + y = 24
If she multiplies the first equation by -2 , she gets,
-4x+6y=4
4x + y = 24
Adding the two equations gives
7y=28
This means y=4
When we put y=4 into the bottom equation we get:
4x+4=24
4x=20
x=5
Therefore Beyonce will still get x=5, and y=4 as solution.
<span>=<span><span><span><span>(8)</span><span>(4)</span></span>−4</span>+5
</span></span><span>=<span><span>32−4</span>+5
</span></span><span>=<span>28+5
</span></span><span>=<span>33</span></span>