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A spinner has equally sized sections, of which are gray and of which are blue. The spinner is spun twice. What is the probability that the first spin lands on blue and the second spin lands on gray ?

### 2 Answers by Expert Tutors

Jim S. | Physics (and math) are fun, reallyPhysics (and math) are fun, really
4.7 4.7 (189 lesson ratings) (189)
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The number of outcomes for the two spins are GG,GB, BB, BG and any of these 4 are equally likely.
So the number of ways to succeed i.e.BG is 1 so the probability of BG in two spins is 1/4 or .25.
Make sense?

Jim
Arthur D. | Effective Mathematics TutorEffective Mathematics Tutor
5.0 5.0 (9 lesson ratings) (9)
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the first spin could land on blue and the second spin could land on blue
bb
the first spin could land on blue and the second spin could land on gray
bg
the first spin could land on gray and the second spin could land on gray
gg
the first spin could land on gray and the second spin could land on blue
gb

there are four possibilities: bb, bg, gg, gb
the probability is 1/4