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bagirrra123 [75]
2 years ago
10

Workers who drive to work in a city have a one in three chance of experiencing traffic delays.

Mathematics
2 answers:
Marysya12 [62]2 years ago
8 0

Answer:

idfk

Step-by-step explanation:

sveticcg [70]2 years ago
5 0

Answer:

its either b or d

Step-by-step explanation:

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A box in a certain supply room contains four 40w, five 60w, and six 75w light-bulbs. suppose that three bulbs are randomly selec
weeeeeb [17]
Situation satisfies the criteria for the use of hypergeometric distribution. Since no replacement is made, binomial distribution is not applicable (probability does not remain constant).

A=number of target wattage bulbs
B=number of non-targeted wattage bulbs
a=number of target wattage bulbs selected
b=number of non-targeted wattage bulbs selected

P(a,b)=C(A,a)*C(B,b)/C(A+B,a+b)
where C(n,x)=combination of x items chosen from n=n!/(x!(n-x)!)

For all following problems, 
A+B=4+5+6=15
a+b=3 (selected)

(a) Target wattage = 75W
A=6, B=9, a=2, b=1
P(a,b,A,B)
=P(2,1,6,9)
=C(6,2)*C(9,1)/C(15,3)
=15*9/455
=27/91

(b) target wattage = each of the three
Probability = sum of probabilities of choosing 3 40,60,75-watt bulbs
P(3x40W)+P(3x60W)+P(3x75W)
Case    (A,B,a,b)
3x40W (4,11,3,0)
3x60W (5,10,3,0)
3x75W(6,9,3,0)

P(3x40W)+P(3x60W)+P(3x75W)
=C(4,3)*C(11,0)/C(15,3)+C(5,3)*C(10,0)/C(15,3)+C(6,3)*C(9,0)/C(15,3)
=4*1/455+10*1/455+20*1/455
=34/455

Can also be solved by elementary counting, for example, for (a),
P(2x75W)
=C(3,2)*6/15*5/14*9/13
=(3)*6/15*5/14*9/13
=27/91 as before
8 0
3 years ago
Triangle ABC is a right triangle on the coordinate system and its vertices are (−2, 5),
antoniya [11.8K]

Answer: 6

Step-by-step explanation:

A=\frac{1}{2}bh\\A=\frac{1}{2}(4)(3)=\boxed{6}

3 0
1 year ago
20x^2 -11x -4 = 0 what are the solutions for this equation
mezya [45]
X= 4/5, - 1/4
Hope it helps
8 0
2 years ago
Is 8/10 greater than 1/2
Kay [80]
Yes because 8/10 as a decimal is 0.8 while 1/2 is 0.5
5 0
3 years ago
Read 2 more answers
Helpp me please
iren [92.7K]

Answer:

<h3>#4</h3>
  • b) Line segment

It includes all the points between those endpoints.

<h3>#5</h3>
  • a) Line

Intersection of the planes results in line.

<h3>#6</h3>
  • a) Axiom

An axiom is a statement that is so evident or well-established, that it is accepted without controversy or question

8 0
2 years ago
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