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2 years ago

Pls help me what is 1 + 1

Mathematics

2 answers:

vitfil [10]2 years ago

7 0

Answer:

1+1=2

Step-by-step explanation:

????????????

Natalka [10]2 years ago

4 0

Answer:

1 + 1 is mathematically 2

Step-by-step explanation:

heres how you know that :) one fish plus one fish is how many fishes ?! 2!! fishes!!

1 + 1 can also = 11 cause thats just how it works

or window

2 + 2 = fish

3 + 3 = 8

4 + 4 = arrow

7 + 7 = triangle

8 + 8 = butterfly

sorry for TMI

this should help for sure :)

mark me brainliest :D

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Answer:

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Answer:

(a) The mean or expected value of X is 2.2.

(b) The standard deviation of X is 1.3.

Step-by-step explanation:

Let X = number of times the traffic light is red when a commuter passes through the traffic lights.

The probability distribution of X id provided.

The formula to compute the mean or expected value of X is:

$\mu=E(X)=\sum x.P(X=x)$

The formula to compute the standard deviation of X is:

$\sigma=\sqrt{E(X^{2})-(E(X))^{2}}$

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(a)

Compute the expected value of X as follows:

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Thus, the mean or expected value of X is 2.2.

(b)

Compute the value of E (X²) as follows:

$E(X^{2})=\sum x^{2}.P(X=x)\\=(0^{2}\times0.06)+(1^{2}\times0.25)+(2^{2}\times0.35)+(3^{2}\times0.15)+(4^{2}\times0.13)+(5^{2}\times0.06)\\=6.58$

Compute the standard deviation of X as follows:

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3 years ago

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