The weight of a glass of jar is 30% of the weight of the jar filled with coffee beans. After some of the beans have been removed, the weight of the jar and the remaining beans is 60% of the original total weight. What fraction part of the beans remain in the jar?
Pick.
A) 1 / 5	B) 1 / 3	C) 2 / 5	D) 1 / 2	E) 3 / 7

Rationale: let weight of jar filled with beans = 100 g weight of jar = 30 g weight of coffee beans = 70 g weight of jar and remaining beans = 60 g weight of remaining beans = 30 g fraction remaining = 30 / 70 = 3 / 7 answer is e .
Answer: E