Answer:
There are a total of 16 equally likely outcomes when spinning the spinner twice, since there are 4 possible outcomes on each spin. These outcomes are:
RR, RO, RG, RB,
OR, OO, OG, OB,
GR, GO, GG, GB,
BR, BO, BG, BB
Out of these 16 outcomes, there are only two outcomes that result in spinning one Red and one Blue: RB and BR.
Therefore, the probability of spinning one Red and one Blue is 2/16, which simplifies to 1/8. So the answer is P(spinning one Red and one Blue) = 1/8.