TASK DEFINITION: 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.
PROBLEM: Question: On flipping 3 coins together what is the outcomes for at least four tail?

 Option A: 1/7

 Option B: 0

 Option C: 1

 Option D: 4/13

 Option E: 5/13

SOLUTION: Option B

PROBLEM: Question: 10 3/4 + 7 2/17 - 9 1/15=?

 Option A: 7 719/1020

 Option B: 9 817/1020

 Option C: 9 719/1020

 Option D: 8 817/1020

 Option E: None of them

SOLUTION: Option D

PROBLEM: Question: When asked how old she was, Pooja replied, 'In 2 years I will be twice as old as I was five years ago.'
How old is she ?

 Option A: 11 years

 Option B: 12 years

 Option C: 8 years

 Option D: 10 years

 Option E: 15 years

SOLUTION:
Option B