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bazaltina [42]
3 years ago
13

114 students choose to attend one of three after school activities: football, tennis or running. There are 53 boys. 53 students

choose football, of which 27 are girls. 23 students choose tennis. 28 girls choose running. A student is selected at random. What is the probability this student chose running? Give your answer in its simplest form.

Mathematics
1 answer:
Masja [62]3 years ago
5 0

Answer:

  1/3

Step-by-step explanation:

The attachment shows a table with the given information filled in. Since we know 53 chose football and 23 chose tennis, the remaining 38 must have chosen running.

Then 38 out of 114 students chose running. The probability that one of those is picked at random is ...

  p(running) = 38/114 = 1/3

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AveGali [126]

The other number is -3.

Step-by-step explanation:

Step 1; First we develop formulae for the given information. A number is added with 3 and the resulting sum is multiplied by 4. This number is then divided by 2 and the quotient is 0. Assume the unknown number is x, then the given information is as follows

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Step 2; Now we solve the above equation. The denominator is taken to the RHS and the RHS remains zero.

\frac{4(x+3)}{2} = 0, 4(x+3)= 0, 4x+ 12 = 0, 4x = -12, x = \frac{-12}{4} = -3.

So the other number is -3.

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4 years ago
a crowbar of 2cm is used to lift an object if 800N. if the effort arm is 260cm. calculate the effort applied.​
Gelneren [198K]

Answer:

solution:Here

Given,

Load=800 N

Load distance=2cm

Effort distance=260cm

Effort applied=?

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or, 800×2 = e × 260

or,1600 = 260e

or,e = 1600/260

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Ira Lisetskai [31]

Given:

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The value of m and n in the given expression.

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Let h be the height of the triangle ABC.

Area of a triangle is:

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Where, b is the base and h is the height of the triangle.

Area=\dfrac{1}{2}\times a\times h

The area of the triangle ABC is D.

D=\dfrac{1}{2}\times a\times h

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In a right angle triangle,

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\sin B =\dfrac{2D}{ac}

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We have,

m\angle B=\sin ^{-1}(\dfrac{m}{n})          ...(iii)

On comparing (ii) and (iii), we get

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Therefore, the required values are m=2D, n=ac.

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DIA [1.3K]

Answer:

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