You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: The profits of QRS company rose 50% from March to April, then dropped 20% from April to May, then rose 50% from May to June. What was the percent increase for the whole quarter, from March to June?

Option A: 15%

Option B: 32%

Option C: 40%

Option D: 62%

Option E: 80%
[EX A]: Option E

[EX Q]: Question: The average weight of 10 person's increases by 4 kg when a new person comes in place of one of them weighing 70kg. What is the weight of the new person?

Option A: 85

Option B: 86.5

Option C: 90

Option D: 88.5

Option E: 110
[EX A]: Option E

[EX Q]: Question: Ram's shop runs a sale on goldfish and platys. If one customer buys 13 goldfish and 12 platys for $5.60, and another buys 14 goldfish and 21 platys for $8.05, what is the ratio of the price of goldfish to platys?

Option A: 0.8

Option B: 0.75

Option C: c

Option D: 5/7

Option E: 6/8
[EX A]:
Option D