Solution:
The question is asking for the probability of selecting a good product at random from a total of 10 products, 7 of which are good.The probability (P) of selecting a good product can be calculated using the formula:P(good product) = Number of good products / Total number of productsAccording to the information provided in the question:Number of good products = 7Total number of products = 10So the probability is:P(good product) = 7/10Therefore, the correct answer is D. 7/10.