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3 years ago

Hey whats 2+2? i need to know ASAP! IM IN PRESCHOOL-

Mathematics

2 answers:

Lady_Fox [76]3 years ago

6 0

Answer:

Step-by-step explanation:

2 + 2 = 4

1 + 1 = 2

1 + 3= 4

Hope this helps, have a nice day/night! :D

if it helps, please mark as brainliest!

Karo-lina-s [1.5K]3 years ago

4 0

Answer:

lol Its 4

Step-by-step explanation:

Dont worry you got this

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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Answer:

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The probability of the ball landing on black slot = $\frac{18}{37}$

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Now, it is stated that Gambler can place bets only on the red or black slot, so;

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and the probability of losing the bet will be = $\frac{18}{37}+\frac{1}{37}$

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= $\$3 \times (-\frac{1}{37})$ = -$0.081

Now, the standard deviation of gambler's total winnings is given by;

S.D.(X) = $\sqrt{(\sum X^{2} \times P(X))-(\sum X \times P(X))^{2} }$

So, $E(X^{2})=\sum X^{2} \times P(X)$

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