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slavikrds [6]
3 years ago
10

A survey of 14 middle school students showed the mean number of minutes students talked on the cell phone in a week was 133. Wha

t is the total number of minutes those students talked in a week?
Mathematics
1 answer:
Orlov [11]3 years ago
4 0
Roughly 1862 minutes.

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At the scene of a crime, the police have found a blood stain, a footprint, and some threads from a fabric. All are presumed to h
zubka84 [21]

Answer:

There is a 0.175% chance of finding such a person who has all three characteristics.

Out of 4,000 people, 7 people would likely to match all three characteristics.

Step-by-step explanation:

A crime has been committed and after analyzing the evidence, police has found out that:

  1. The criminal's blood type is a type found in only 10% of the population.
  2. The criminal's footprint is a size 13 men's shoe and only 7% of the population wears such shoe size.
  3. Only 25% of the population owns clothing made from a fabric that matches the thread samples found at the scene.

We required to find out the probability of selecting a random person who would match all of these characteristics.

Since it is given that the three characteristics are independent of each other then the required probability is  

P(all 3 characteristics) = P(1st characteristic)*P(2nd characteristic)*P(3rd characteristic)

P(all 3 characteristics) = (10/100)*(7/100)*(25/100)

P(all 3 characteristics) = 1750/1,000,000

P(all 3 characteristics) = 7/4000

P(all 3 characteristics) = 0.00175

P(all 3 characteristics) = 0.175%

So out of 4,000 people, 7 people would likely to match all three characteristics.

or

There is a 0.175% chance of finding such a person who has all three characteristics

3 0
3 years ago
Find the average rate of change of the function
max2010maxim [7]
X1 = 4 so sqrt(4) = 2
x2 = 9 so sqrt(9) = 3
3-2 = 1

9-4 = 5

rate of change = 1/5
3 0
3 years ago
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Stephen is using a map to plan a hike. The map is based on a scale of 1:40,000, in cm. If the route is 10 cm on the map, how man
kvasek [131]
1/40,000 = h/10
40,000h = 10
h = 10/40,000
h = 1/4,000
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Students from grades 11 and 12 in Jason's school were asked to vote for the prom king and queen. Jason surveyed every 12th stude
Ymorist [56]

Answer:

you don't even ask a question here

Step-by-step explanation:

6 0
2 years ago
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Evaluate 3x-4 when x=5
Ronch [10]

Answer: 11

Step-by-step explanation:

Substitute x with 5.

3(5)-4=11

7 0
2 years ago
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