All categories

3 years ago

Probability involving choosing from objects that are not distinct

Mathematics

1 answer:

Sliva [168]3 years ago

7 0

Step-by-step explanation:

No. of possible selections= 5+4+3= 12

Probability of selecting drama= 3÷12

= 1÷4

PLEASE MARK BRAINLIEST.

You might be interested in

A sphere has a diameter of 20 cm. What would bre the volume of sphere? Please help due today

Tomtit [17]

4188.79 would be de answer. Hope that helps.

6 0

4 years ago

Which of the following have the property that a(x)=a−1(x)? I. y=x II. y=1/x III.y=x^2 IV. y=x^3 A. I and II, only B. IV, only C.

valentina_108 [34]

Answer:

Correct answer:

A. I and II

Step-by-step explanation:

First of all, let us have a look at the steps of finding inverse of a function.

1. Replace y with x and x with y.

2. Solve for y.

3. Replace y with $f^{-1}(x)$

Given that:

$I.\ y=x \\II.\ y=\dfrac{1}x \\III.\ y=x^2 \\IV.\ y=x^3$

Now, let us find inverse of each option one by one.

I. y = x, a(x) = x

Replacing y with and x with y:

x = y

x = $a^{-1}(x)$ = $a(x)$ Hence, I is true.

II. $y =\dfrac{1}{x}$

Replacing y with and x with y:

$x =\dfrac{1}{y}$

$x=\dfrac{1}{a^{-1}(x)}$

$\Rightarrow a^{-1}(x) = \dfrac{1}{x}$

$a^{-1}(x)$ = $a(x)$ Hence, II is true.

III. $y =x^{2}$

Replacing y with and x with y:

$x =y^{2}\\\Rightarrow y = \sqrt x\\\Rightarrow a^{-1}(x) = \sqrt{x} \ne a(x)$

Hence, III is not true.

IV. $y =x^{3}$

Replacing y with and x with y:

$x =y^{3}\\\Rightarrow y = \sqrt[3] x\\\Rightarrow a^{-1}(x) = \sqrt[3]{x} \ne a(x)$

Hence, IV is not true.

Correct answer:

A. I and II

4 0

3 years ago

7.The mass of a grain of sand is approximately 2.8×10^−11 grams

ZanzabumX [31]

The Answer is A. Milligram.

8 0

3 years ago

Read 2 more answers

Simplify the expression. Show each step. –5 × 1 × 11 × 4.

netineya [11]

Simplify the following:
-5×1×11×4

-5×1 = -5:
-5×11×4

-5×11 = -55:
-55×4

-55×4 = -220:

Answer: -220

7 0

3 years ago

Solve each equation 6=3x-5+8x

Shalnov [3]

6 = 11x-5
11x=11
x = 1

4 0

3 years ago