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aivan3 [116]
3 years ago
12

Mr. Adams has 14 boys and 8 girls in his mathematics class. If he chooses

Mathematics
1 answer:
scZoUnD [109]3 years ago
5 0

Answer:

it is more likely that both of the students will be boys because there are 14 boys and 8 girls. 14 is greater than 8. So, both of the students that are chosen will be boys,

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The length of time to complete a door assembly on an automobile factory assembly line is normally distributed with a mean of 6.7
hram777 [196]
We need to work out the z-value of each question to work out the probability

Question a)

We have
X = 5 minutes
The mean, μ = 6.7 minutes
Standard deviation, σ = 2.2 minutes
z-score = (X - μ) / σ = (5 - 6.7) / 2.2 = -0.77

We want to find the probability of z < -0.77 so we read the z-table for the value of z on the left of -0.77 we have the probability P(z< -0.77) = 0.2206

The table is attached in picture 1 below

The probability of assembly time less than 5 minutes is 0.2206 = 22.06%

Question b)

z-score = (10-5) / 2.2 = 2.27

Reading the z-table for P(z<2.27) = 0.9884
The table reading is shown in the second picture below

The probability the assembly time will be less than 10 minutes is 0.9884

We can use this information to find the probability of the assembly time will be more than 10 minutes  = 1 - 0.9884 = 0.0116 = 1.16%

Question c)

The value of z between 5 minutes and 10 minutes is

P(-0.77<z<2.27) = P(z<2.27) - P(z< -0.77)
P(-0.77<z<2.27) = 0.9884 - 0.2206 = 0.7678 = 76.78%


6 0
3 years ago
At your gym, the bar you lift weighs 45 pounds. You add weights to the bar that are 10 pounds each. If you add 8 weights to the
lana66690 [7]
45 plus 80 which is 125 pounds
4 0
3 years ago
Read 2 more answers
Sally has 10 pounds she wants to buy 28 cans of soda which cost 28p each does she have enough money
Vladimir79 [104]

Answer:

Yes, Sally has enough money to buy 28 cans of soda.

Step-by-step explanation:

Yes, because £10 = 1000p

1000p / 28p = 35 cans

35 cans < 28 cans

So Sally has enough money for 28 cans.

4 0
1 year ago
each side of an equilateral triangle measures 32 centimeters, as shown. What is the approximate height h of the triangle?
Neko [114]
32 square root 6
use the pythagoream theorum
the sides would be 32 and 16. 16^2+x^2=32^2

4 0
3 years ago
so im helping my lil brother he needs help and wanted to ask yall! he did not want me to help him he wants yall to!!
8_murik_8 [283]

Answer:

12 yards=36 feet

Step-by-step explanation:

1 yard=3 feet

2 yards=6 feet

3 yards=9 feet

4 yards=12 feet

5 yards=15 feet

6 yards=18 feet

7 yards=21 feet

8 yards=24 feet

9 yards=27 feet

10 yards=30 feet

11 yards=33 feet

12 yards= 36 feet

<em>Hope this helped!! :)</em>

<em>Stay safe and have a wonderful day/night!!!!! </em>

<em>Brainliest?!?!</em>

<em>Tell your brother I said Hi!</em>

<em>Sorry if this is incorrect, correct me if I'm wrong.</em>

3 0
2 years ago
Read 2 more answers
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