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Alinara [238K]
2 years ago
13

There are 38 students in a class. 13 of them like to play badminton, 22 of them like to play tennis while 5 of them are not inte

rested in either sports games. Find the number of students who like to play both sports games.​
Mathematics
1 answer:
snow_lady [41]2 years ago
3 0

Answer:

2

Step-by-step explanation:

38 total students

5 like neither one, so 38 - 5 = 33

22 plus 13 is 35, but only 33 students like one of them, so 35 - 33 = 2 extra votes, which means 2 like both.

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A set of final examination grades in an introductory statistics course is normally​ distributed, with a mean of 77 and a standar
Shalnov [3]

Answer:

0.9007 is the probability that a student scored below 86 on this​ exam.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 77

Standard Deviation, σ = 7

We are given that the distribution of examination grades is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

a) P(student scored below 86)

P(x < 86)

P( x < 86) = P( z < \displaystyle\frac{86 - 77}{7}) = P(z < 1.2857)

Calculation the value from standard normal z table, we have,  

P(x < 1.2857) = 0.9007 = 90.07\%

0.9007 is the probability that a student scored below 86 on this​ exam.

7 0
3 years ago
A train leaves Ayr station every day at 09:50 and arrives in Glasgow at 10:39. How long is the journey?
Pepsi [2]

Answer:

49 minutes

Step-by-step explanation:

9:50 to 10:00 is 10 minutes

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hope i helped

4 0
3 years ago
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Anastaziya [24]

Answer:

B

Step-by-step explanation:

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The density of aluminum is 2.375 grams per cubic centimeter. Find the volume of a portion of a sheet of aluminum that has a mass
Rufina [12.5K]
This is the concept of density, volume and mass of different materials; To calculate for the volume of an aluminium material with density of 2.375 grams per cubic centimeter and a mass of 0.78 Kilogram we proceed as follows;
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3 years ago
Correct answer gets brainliest and 5 stars
Serggg [28]

Answer:

A is false

Step-by-step explanation:

notice how in both diagrams, there are 4 triangles with lengths a, b, c, but in each diagram the triangles are just rotated and positioned differently. if there are the same amount of triangles in both diagrams, and the have equal lengths then the area of the remaining figure, should both match up.

basically the area of the big square in Step 2, is equal to both of the shaded squares, combined area, in Step 1.

3 0
3 years ago
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