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victus00 [196]
3 years ago
10

(2×1)+(4×0.1)+(7×0.001)=

Mathematics
1 answer:
Andrews [41]3 years ago
5 0
2.507



......................................
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Each of three bags A, B, C contains white balls and black balls. A has a1 white & b1 black, B has a2 white & b2 black an
Alex73 [517]

Answer:

See explanation ( Answers are too long)

Step-by-step explanation:

We will first compute a general probability for picking a white ball:

          P (W) = a_1 / (a_1 + b_1) + a_2 / (a_2 + b_2) + a_3 / (a_3 + b_3)

part a)

We are asked to find the probability of white ball given that it pulled from bag A. So if we express it in notation we are asked for P ( A / W). We will use conditional probability to answer our question:

                           P ( A / W ) = P ( W & A ) / P (W)

                           P ( W & A ) = a_1 / (a_1 + b_1)

Hence,

P ( A / W ) = [a_1 / (a_1 + b_1)] / [a_1 / (a_1 + b_1) + a_2 / (a_2 + b_2) + a_3 / (a_3 + b_3)]    

part b)

We are asked to find the probability of white ball given that it pulled from bag B. So if we express it in notation we are asked for P ( B / W). We will use conditional probability to answer our question:

                           P ( B / W ) = P ( W & B ) / P (W)

                           P ( W & B ) = a_2 / (a_2 + b_2)

Hence,

P ( A / W ) = [a_2 / (a_2 + b_2)] / [a_1 / (a_1 + b_1) + a_2 / (a_2 + b_2) + a_3 / (a_3 + b_3)]    

part c)

We are asked to find the probability of white ball given that it pulled from bag C. So if we express it in notation we are asked for P ( C / W). We will use conditional probability to answer our question:

                           P ( C / W ) = P ( W & C ) / P (W)

                           P ( W & C ) = a_3 / (a_3 + b_3)

Hence,

P ( A / W ) = [a_3 / (a_3 + b_3)] / [a_1 / (a_1 + b_1) + a_2 / (a_2 + b_2) + a_3 / (a_3 + b_3)]    

     

6 0
3 years ago
A triangle is a blank with 3 sides
slega [8]
It's a shape or polygon or convex figure or closed figure
7 0
3 years ago
A book store is hosting a special night in which families can enjoy a story and craft time. Tickets to the
Arturiano [62]

Answer:

75 total tickets

Step-by-step explanation:

METHOD 1:

We know that 45 children's tickets have been sold, being 60% of the total tickets having been sold.

So, basically, we solve for x:

We have, 60% × x = 45

or, 60/100 × x = 45

Multiplying both sides by 100 and dividing both sides by 60,

we have x = 45 × 100/60

x = 75

If using calculator, enter 45x100/60, which will give you the answer.

------------------------

METHOD 2:

Division is the opposite of multiplication

Start with the formula to calculate the percentage of total

y=value÷ percentage/100

Substitute values in the equation

y=45÷60/100

Simplify and solve

y=45÷0.6

y=75

Both methods give you 75, therefore 75 tickets have been sold

7 0
2 years ago
Read 2 more answers
Which expression is equivalent to 1/4(8-6x+12)?
elena-s [515]
<span>1/4(8-6x+12)
= 1/4 (12+8-6x)
= 1/4(20-6x)
= 1/4 * 20 - 1/4 * 6x
= 5 - 3/2x
= -3/2x + 5

Answer is D.

Hope it helps!
</span>
4 0
3 years ago
If 4x + 2z = 5y, and z = x + y, then the ratio of y to x is
Alja [10]

Answer:

z=x+y

2=4+5

4=-2+5

4=-7

5 0
2 years ago
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