When the odds are given you can find the probability of each liking the book.

Let the probability of the 3 critics liking the buk b A,B,C.

And let A* be the Prob. of them disliking the buk.

 

Now the probability of the buk being liked by a majority will be:

 

ABC + ABC* + AB*C + A*BC.

And that is your answer.....