Study the following letter/number series carefully and answer the questions given below it.W 3 7 H J Q T 5 1 2 G K 4 F P T 6 L B E 9 4 D M R 8 2 VArun is fifth from the left end and Navin is twelfth from the right end in a row of children. If Navin shifts by three places towards Arun he becomes tenth from the left end. How many children are there in the row
