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kumpel [21]
3 years ago
11

Suppose that of all individuals buying a certain digital camera,60% include an optional memory card in their purchase, 40%includ

e an extra battery, and 30% include both a card and battery.1A randomly selected buyer is known to have purchased anextra battery. Find the probability that an optional card wasalso purchased.2A randomly selected buyer is known to have purchased anoptional card. Find the probability that an extra battery wasalso purchased.
Mathematics
1 answer:
sammy [17]3 years ago
7 0

Answer:

1A) 0.75

2A) 0.5

Step-by-step explanation:

Let A be an event of include an optional memory card

B be an event of include an extra battery

P(A) = 0.6

P(B) = 0.4

P(A and B) = 0.3

1A)  P(A|B) = P(A and B) /P(B) = 0.3 / 0.4 = 0.75

2A) P(B|A) = P(A and B)/P(A) = 0.3/0.6= 0.5

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AD←→ is tangent to circle M at point D. The measure of ∠DMQ is 58º.
Marat540 [252]

Answer:

32°

Step-by-step explanation:

Given:

∠DMQ = 58º

In this circle, the radius is DM. Since AD is tangent to the circle M, at point D, and the angle between a tangent and a radius is 90°

Therefore, ∠MDQ = 90°

The total angle in a triangle is 180°. Since we have the values of ∠MDQ and ∠DMQ, ∠DQM will be calculated as:

180 = ∠DMQ + ∠MDQ + ∠DQM

Solving for ∠DQM, we have:

∠DQM = 180 - ∠DMQ - ∠MDQ

∠DQM = 180 - 90 - 58

∠DQM = 32°

The measure of ∠DQM is 32°

6 0
3 years ago
0.00000000828860 in scientific notation
azamat

0.00000000828860 upto which decimal?


6 0
3 years ago
The table represents the relationship between a length measured in meters and the same length measured in kilometers.
Bess [88]

Answer:

Q1 1000     1

    3500    3.5

   500       .5

   75   .075

   1        .001

   x       1/1000x or .001x        Q2    Y=  1/1000x

Step-by-step explanation:

just search up 1000 meters to 1 kilometer and go from there :)  

4 0
3 years ago
Suppose you have a bag containing 2 black marbles and 3 red marbles. You reach into the bag, select a marble, see what color it
sweet [91]
(3/5)(2/5)=6/25
.............................
4 0
3 years ago
Please help me! I will give brainliest to the best answer
8_murik_8 [283]
1. When there are two events that need to happen, we must multiply the probability of each event happening.

Shawn losing to Mike: 5/8 chance
Shawn losing to Tim: 2/7 chance

5/8 × 2/7 = 10/56 = 5/28

There's a 5/28 chance of Shawn losing to Mike and Tim.

I don't know #2, sorry :/

Hope this helps!
5 0
3 years ago
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