A company sells 5 different products with the following probabilities of being purchased by a customer: Product A - 30%, Product B - 25%, Product C - 20%, Product D - 15%, and Product E - 10%. If a customer buys only one product, what is the probability that they purchase either Product B or Product D?
To find the probability of a customer purchasing either Product B or Product D, we can simply add their individual probabilities:

P(B or D) = P(B) + P(D)
          = 25% + 15%
          = 40%

So, the probability of a customer purchasing either Product B or Product D is 40%.