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SCORPION-xisa [38]

2 years ago

6

Kesha is choosing a 3 letter password from the letters ABCDE the password cannot have the same letter repeated in it how many su

ch passwords are possible

1 answer:

Bingel [31]2 years ago

5 0

5x4x3=215
I'm pretty sure this is right. Good luck!:)

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A coin, having probability p of landing heads, is continually flipped until at least one head and one tail have been flipped. (a

Natali [406]

Answer:

(a)

The probability that you stop at the fifth flip would be

$p^4 (1-p) + (1-p)^4 p$

(b)

The expected numbers of flips needed would be

$\sum\limits_{n=1}^{\infty} n p(1-p)^{n-1} = 1/p$

Therefore, suppose that $p = 0.5$ , then the expected number of flips needed would be 1/0.5 = 2.

Step-by-step explanation:

(a)

Case 1

Imagine that you throw your coin and you get only heads, then you would stop when you get the first tail. So the probability that you stop at the fifth flip would be

$p^4 (1-p)$

Case 2

Imagine that you throw your coin and you get only tails, then you would stop when you get the first head. So the probability that you stop at the fifth flip would be

$(1-p)^4p$

Therefore the probability that you stop at the fifth flip would be

$p^4 (1-p) + (1-p)^4 p$

(b)

The expected numbers of flips needed would be

$\sum\limits_{n=1}^{\infty} n p(1-p)^{n-1} = 1/p$

Therefore, suppose that $p = 0.5$ , then the expected number of flips needed would be 1/0.5 = 2.

7 0

2 years ago

Solve for X <br><br> Please and thanks

Tpy6a [65]

<u>Given</u>:

The measure of ∠ABD is (4x + 15)°

The measure of ∠DBC is (13x + 7)°

We need to determine the value of x.

<u>Value of x:</u>

Since, we know the property that every angle in a rectangle is 90°

Hence, the value of x can be determined by adding the two angles and equating to 90°

Thus, we have;

$\angle ABD+\angle DBC=90^{\circ}$

Substituting the values, we have;

$4x+15+13x+7=90$

$17x+22=90$

$17x=68$

$x=4$

Thus, the value of x is 4.

4 0

3 years ago

Suppose f(x) and g(x) are differentiable functions satisfying f(1) = f′(1) = 2. Let

just olya [345]

Answer:

1777777777888876332222233

3 0

1 year ago

3. Armani has $7.00 in her purse consisting of nickels, dimes, and quarters. The total

True [87]

Answer:

700=700

Step-by-step explanation:

3 0

2 years ago

What is it p l z <br><br>zzzzzzzzzzzzzzzzz

Aleks04 [339]

Since a whole rotation is 360 degrees, you can take the whole rotation subtract it by the minor arc (92 degrees) which will equal the major arc (B=268 degrees)

5 0

9 months ago

Read 2 more answers