TASK DEFINITION: In this task, you need to provide the correct option for a given problem on probability from the provided options.
PROBLEM: Problem: in 15 year ' s time the combined age of my 4 brothers will be 107 . what will it be in 6 year ' s time ?
Options: a ) 65 , b ) 87 , c ) 71 , d ) 60 , e ) 66

SOLUTION: c

PROBLEM: Problem: if x is to be chosen at random from the set { 1 , 2 , 3 , 4 } and y is to be chosen at random from the set { 6 , 7 } , what is the probability that xy will be even ?
Options: a ) 1 / 6 , b ) 1 / 3 , c ) 1 / 2 , d ) 2 / 3 , e ) 5 / 6

SOLUTION: a

PROBLEM: Problem: how many different pairs of numbers ( s , t ) such that s = 3 t can be obtained if s and t are selected from the set of number { 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 }
Options: a ) 1 , b ) 2 , c ) 3 , d ) 4 , e ) 5

SOLUTION:
e