Asked by Mike
Could you explain to me why 9/64 is the answer to the following questions:A fair spinner is spun three times. The spinner is labeled A,B,C,D. What is the probability of getting a c exactly twice?
Answers
Answered by
jerome
because 9/64=3/16 (9/64)/3=3/16
three spins, four possible answers per spin. 3*4=16.
three spins, four possible answers per spin. 3*4=16.
Answered by
Reiny
prob(c) = 1/4
prob(not c) = 3/4
so you are looking for
c c notc = (1/4)(1/4)(3/4) = 3/64
c notc c = (1/4)(3/4)(1/4) = 3/64
notc c c = (3/4)(1/4)(1/4) = 3/64
prob of your event = 3(3/64) = 9/64
prob(not c) = 3/4
so you are looking for
c c notc = (1/4)(1/4)(3/4) = 3/64
c notc c = (1/4)(3/4)(1/4) = 3/64
notc c c = (3/4)(1/4)(1/4) = 3/64
prob of your event = 3(3/64) = 9/64
Answered by
ericka
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