GRE Exam Numerical Ability Percentage

In a basket full of balls, 60% are mangoes and remaining 40% are apple. 25% of apples are green and the rest 75% are red. Of the mangoes, 80% are red and the rest of the mangoes are green, What percentage of the green fruits are mangoes?

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GRE Other Question

A train travels from station A to C having distance of 285 miles in 6 hours. During the journey, it reaches intermediate station B at the average speed of 40 miles/hr. From station B, train reaches station C at average speed of 55 miles/hr. What is the distance between the station B and C? There are 10 multiple choice questions in an examination. First 4 have 5 choices each and remaining have 4 choices each. How many sequences of answers are possible?
a)4^5 * 5^4 b)4^5 * 6^4 c)5^4 * 6^4 d)5^4 * 4^6