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irina [24]
3 years ago
14

There are two coins in a bag. for coin 1, p(h) = ½ and for coin 2, p(h) = 1/3. your friend chooses one of the coins at random an

d tosses it 5 times.
a. what is the probability of observing at least 3 heads?
b. you ask your friend: “did you observe at least 3 heads?”. your friend replies, “yes”. what is the probability that coin 2 has been chosen?
Mathematics
1 answer:
lana [24]3 years ago
8 0
The answer is 3 to this question
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Ann's watch runs 2 minutes per hour too slow. Beth's watch runs 1 minute per hour too fast. For example, if both watches were co
Elenna [48]

Answer:

8 am Monday

Step-by-step explanation:

The difference between the two watches is  2+1= 3 minutes.

It would take 60/3 = 20 hours to have a difference of 60 minutes.

From noon Sunday it would be more 20 hours the earliest time there would be a difference of one hour between the two watches' time.

12 noon + 20 hours=  8 am Monday

7 0
3 years ago
A woman walks due west on the deck of a ship at 3 mi/h. The ship is moving north at a speed of 22 mi/h. Find the speed and direc
Minchanka [31]

Answer: The speed is 22.2 mi/hr and woman is 8° north relative to the surface of the water.

Step-by-step explanation:

Since we have given that

Speed at which woman walks due west = 3 mi/hr

Speed at which ship moving due north = 22 mi/hr

Now it forms "Pythagorus theorem":

So, it becomes,

H^2=B^2+P^2\\\\H^2=3^2+22^2\\\\H^2=9+484\\\\H^2=493\\\\H=\sqrt{493}\\H=22.20\ mi/hr

And the direction of the woman relative to the surface of the water is given by

\theta=\sin^{-1}x(\dfrac{3}{22.2})=7.76\approx 8^\circ

Hence, the speed is 22.2 mi/hr and woman is 8° north relative to the surface of the water.

5 0
3 years ago
A window in the shape of a parallelogram has the dimensions given.
devlian [24]

Answer:

A. 20ft

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Equavlent to (-18x-12)-13x+17
Setler79 [48]
-31x+5  is the same as (-18x-12)-13x+17
3 0
3 years ago
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Johnny answered 40 questions correctly on his 60 question test. What percent of questions did Johnny answer correctly?
Rzqust [24]

Answer:

66.6%

Step-by-step explanation:

40/60=4/6=2/3

2/3=66.6

4 0
3 years ago
Read 2 more answers
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