The number of ways that the company can choose four workers is 40920 ways.
<h3>How to calculate the number?</h3>
From the information, the building company employs 3 laborers 12 joiners 8 electrician 4 plumbers. The total number of workers will be:
= 3 + 12 + 8 + 4
= 27 workers
It should be noted that combination will be used to choose the 4 workers. This is illustrated as
Combination formula
ⁿCr = n! / ((n – r)! r!)
n = the number of items.
r = how many items are taken at a time.
where n = 33
r = 4
ⁿCr = n! / ((n – r)! r!)
³³C₄ = 33! / (33 - 4)! 4!
= 33! / 29! 4!
= 33 × 32 × 31 × 30 / 4 × 3 × 2
= 40920 ways
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2n(n + 3) - 5(n + 3) = (2n-5)(n+3)
A. (n + 3) (2n - 5)
Answer:
Step By Step Explanation:
Switch Sides
Add 5 To Both Sides
Simplify
Multiply Both Sides By -4
Simplify
Answer:
12
Step-by-step explanation:
radius is half of diameter
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x = a - 2by^2
- a
x - a = -2by^2
/-2b
(x - a)/-2b = y^2
square root it:
y = √(x - a)/-2b
(note : everything is inside the square root)
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