Answer:
<em>The approximate percentage of women with platelet counts between 127.7 and 378.5 </em>
<em>P( 127.7 ≤x≤378.5) = 0.9544 or 95 percentage</em>
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
<em>Mean of the Population = 253.1</em>
<em>Given standard deviation of the Population = 62.7</em>
<em>Given sample size 'n' = 873</em>
<em>Let 'X' be the random variable in Normal distribution</em>
<em>Let x₁ = 127.7</em>
Let x₂ = 378.5
<u><em>Step(ii)</em></u>:-
<em>The probability of women with platelet counts between 127.7 and 378.5.</em>
<em>P( 127.7 ≤x≤378.5) = P( -2≤Z≤2)</em>
<em> =</em> P(<em>Z≤2) - P(Z≤-2)</em>
<em> = 0.5 +A(2) - ( 0.5 - A(-2))</em>
<em> = A(2) + A(2) (∵A(-2) =A(2)</em>
<em> = 2 × A(2)</em>
<em> = 2× 0.4772</em>
<em> = 0.9544</em>
<u><em>Conclusion</em></u><em>:-</em>
<em>The approximate percentage of women with platelet counts between 127.7 and 378.5 is 0.9544 or 95 percentage</em>
Answer:
78.5 ft²
Step-by-step explanation:
The area of a circle is given by
Area = πr²
where r is the radius = given as 5 ft
π = 3.14
substituting the values into the equation, we get
Area
= πr²
= (3.14) (5²)
= 78.5 ft²
The matrix expressions are:
- Matrix 2 cannot be solved
<h3>How to solve the matrix expression?</h3>
The rule for matrix product states that:
If the dimensions of matrix A is m by n, and the dimension of matrix B is n by p.
Then, the dimension of the product matrix is: m by p
Using the above rule, we have:
<u>Expression 1:</u>
Expand:
By comparison, we have:
12a + 7c = 2
5a + 3c = 3
12b+ 7d = -1
5b + 3d = 2
Using a graphing tool, we have:
a = -15, b = -17, c = 26 and d = 29
Hence, the matrix expression is:
<u>Expression 2:</u>
Expand:
By comparison, we have:
6.75a + 3b = 8
-9a - 4b = 5
Using a graphing tool, the system of equation has no solution
Hence, the matrix expression cannot be solved
<u>Expression 3:</u>
Expand:
By comparison, we have:
-2a + 3b = 6
3a + 5b = 8
Using a graphing tool,
a = 3 and b = 4
Hence, the matrix expression is:
Read more about matrix at:
brainly.com/question/1821869
#SPJ1
Answer:
oop
Step-by-step explanation:
The answer is 28n. If you add all the numbers and add the "n" you'll have this.