Median means the entry needs to be present in the list. Having the average isn't enough. So, 1 is not sufficient

2 is not sufficient as it doesn't mention the price of the other two books.

Combining both the statements: The average is 3 and one of the entry is 1.5

Since one of the entry is 1.5, we are left with 3 as the price of two other books combined. Any combination of 2 numbers adding to 3 will follow two pattern:

--> either both are 1.5 each

--> one is smaller and the other is greater than 1.5. both simultaneously can't be smaller or bigger than 1.5

In both the patterns above, 1.5 will lie in the middle of the list, Nd hence, 1.5 is the median

Answer is C

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