Answer:
The weight of the zinc in the metal bar was 50% of the weight of the metal bar .
Step-by-step explanation:
Weight of the metal bar ,M= 36 g
Weight of the zinc in the metal bar , m= 18 g
Percentage of zinc in the metal bar :


The weight of the zinc in the metal bar was 50% of the weight of the metal bar .
Answer:
3 || 3
6 || 9
9 || 15
12 || 21
In the first column, we see the numbers increasing by +3, serially.
In the second column, we see the numbers increasing by +6, serially.
OPTION C is the correct answer.
Hope it helps you...