A, B and C can solve , and of the sums from a book. If one sum from that book is given to them to solve then what is the probability that the sum will be solved?
Finding the probability:
Let E, F and G be the events defined as follows,
E A solves the sum,
F B solves the sum,
G C solves the sum.
Clearly, E, F and G are independents events such that,
, and ,
Therefore, the required probability,
Hence, the required probability is .