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erik [133]
4 years ago
13

The following table shows the probability distribution for a discrete random

Mathematics
2 answers:
denis23 [38]4 years ago
4 0

Answer:

  • <u><em>Option C. 29.47</em></u>

Explanation:

The <em>expected value</em>, <em>E(X)</em> or <em>mean </em>of a <em>discrete random variable</em> is given by:

        E(X)=\sum\limits^n_i {x_i}\cdot P(x_i)

Using the data from the <em>table</em>:

E(X)=22\times 0.16+24\times 0.09+25\times 0.18+30\times 0.12+33\times 0.24+37\times 0.21

Computing:

         E(X)=3.52+2.16+4.50+3.60+7.92+7.77=29.47

Artemon [7]4 years ago
4 0

Answer:

29.47, or option C.

Step-by-step explanation:

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we can calculate the other leg

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1 year ago
A cylinder and a cone are shown below.
Dmitrij [34]

Answer:

The bases do not have the same area because the volume of the cylinder is not 3 times the volume of the cone, given the same heights.

Step-by-step explanation:

Recall :

V1 = volume of cylinder = πr²h

V2 = volume of a cone = 1/3πr²h

From the diagram, both have height, h of 12

Radius = r

V1 = 2512 in

V2 = 1256 in

From the ratio :

2512 = πr² * 12

1256 = 1/3πr² * 12

12 cancel out as well as r² and π

If the bases have the same area `, then 2512 should be equal to (1256 * 3)

2512 in ≠ 3868 in

5 0
3 years ago
Read 2 more answers
Consider the trinomial x^2+10x+24
tino4ka555 [31]

Answer:

see explanation

Step-by-step explanation:

(a)

(x + 2)(x + 12) ← expand using FOIL gives

x² + 14x + 24 ≠ x² + 10x + 24

(b)

consider the factors of the constant term (+ 24) which sum to give the coefficient of the x- term (+ 10)

the factors are + 6 and + 4 , since

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8 0
3 years ago
Write and solve the inequality.
Bezzdna [24]

Answer:

b

Step-by-step explanation:

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3 years ago
Which statements are true about a rectangular pyramid with a height of 9 centimeters and a base with the dimensions of 4
tigry1 [53]

Answer:

- The area of the base of the pyramid, B, is 24 cm

- A rectangular prism with the dimensions of 9 cm by 4 cm by 6 cm will have 3 times volume of this pyramid.

Step-by-step explanation:

Volume of a rectangular based pyramid = 1/3{Base area × Height}

Base Area = Length × Breadth

Volume = 1/3{(Length × Breadth) × Height}

Given a rectangular pyramid with a height of 9 centimeters and a base with the dimensions of 4

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If Height =9cm

Volume of the pyramid = 1/3 × 24 × 9

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Volume of the pyramid = 72cm³

If the shape is a prism, the volume will be base area × height

= 24 × 9

= 216cm³

It can be seen that volume of rectangular prism = 3 × volume of rectangular pyramid.

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4 years ago
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