In this task, you need to provide the correct option for a given problem from the provided options.
--------
Question: Problem: the hcf of two numbers is 42 and the other two factors of their lcm are 10 and 20 . what is the largest number .
Options: a ) 462 , b ) 450 , c ) 840 , d ) 504 , e ) 555

Answer: c

Question: Problem: a bag contains 7 green and 8 white balls . if two balls are drawn simultaneously , the probability that both are of the same colour is
Options: a ) 7 / 16 , b ) 7 / 12 , c ) 7 / 19 , d ) 7 / 12 , e ) 7 / 15

Answer: e

Question: Problem: sachin is younger than rahul by 14 years . if the ratio of their ages is 7 : 9 , find the age of sachin
Options: a ) 48 , b ) 24.8 , c ) 24.21 , d ) 24.88 , e ) 49

Answer:
e