SOLUTION: A spinner with 3/4 blue and 1/4 red is spun twice. What is the probability of; a) red on the first spin b)blue on the first spin and red on the second c) both the same color d

Question 1143806: A spinner with 3/4 blue and 1/4 red is spun twice.
What is the probability of;
a) red on the first spin
b)blue on the first spin and red on the second
c) both the same color
d)different colors
Answer by ikleyn(52780) (Show Source): You can put this solution on YOUR website!
.


(a)  P = .      ANSWER    (It is obvious)



(b)  P(first is blue AND second is red) = 

     = product of particular probabilities P(first is blue)*P(second is red) = . = .    ANSWER



(c)  P =  +  =  =  =  = 0.625 = 62.5%.       ANSWER



(d)  P =  +  =  =  = 0.375 = 37.5%.     ANSWER


     Also notice that the probability of (d) is the complement to the probability of (c).

All questions are answered -- the problem is solved.

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