The temperature in a chemical plant was -5oC at 2.00 am. The temperature fell by…

The temperature in a chemical plant was -5^oC at 2.00 am. The temperature fell by 6^oC and then rose again by 7^oC. What was the final temperature?

Correct Answer: Option B

Explanation

Temperature = -5^oC
It fell by 6^oC = -5^oC – 6^oC
= -11^oC
Then rose by 7^oC = -11 + 7
= -4^oC (final temperature)