Question 469527
The probability of winning is 0.45 every time you play a certain game. Suppose you play the game 10 times. 
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Note: Binomial Problem with n = 10 and p = 0.45
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1. Find the probability that you will win exactly 4 times. Round answer to three places after the decimal point.
I got this one correct=
.238
Correct
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2. Find the probability that you will win 2 or more times. Round answer to three places after the decimal point.
P(2 <= x <= 10) = 1 - P(0<= x <=1) = 1 - 0.023 = 0.9767 
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3. Find the expected number of times you will win, and the standard deviation. Round both answers to three places after the decimal point.
np = 10*0.45 = 4.5
and 
sqrt(npq) = sqrt(4.5*0.55) = 1.5732
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Cheers,
Stan H.