Here are our two statements:
(1) The product jk is a divisor of 48
(2) j =3
Think about it. Statement (1) says that the product of j and k is a divisor of 48. Statement (2) says that j = 3.
So if we combine the two statements, we get:
"The product of 3 and k is a divisor of 48."
It's NOT saying that the product of 3 and k equals 48. It's saying that the product of 3 and k is a
divisor of 48. So it's saying that if we take k and multiply it by 3, that result will divide 48 evenly.
So k could be equal to 16. In that case 3*16=48. And 48 is a divisor of 48.
Or k could be equal to 4. In which case 3*4=12. And 12 is a divisor of 48.
The bottom line, we just know what k equals. Therefore we don't know if it divides 24 evenly. (For example, 16 doesn't divide 24 evenly but 4 does).
Choice E
Let me know if this is clear.