In the following questions numbered 1 to 20, a question is followed by data in the form of two statements labelled as (I) and (II) You must decide whether the data given in the statements are sufficient to answer the questions.

Question 14

How many marks did he get in Mathematics?
(I) The average of his marks in Mathematics, Physics and Chemistry is 79.
(II) The average of his marks in Mathematics and Chemistry is 72.

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