Question

Question 1

Answer 1

Answer: The percent of red lights last between  2.5 and 3.5 minutes = 95.44% approx.

Step-by-step explanation:

Given: Mean time = 3 minutes

standard deviation = 0.25 minutes

The probability of red lights last between  2.5 and 3.5 minutes :-

$P(2.5$

The percent of red lights last between  2.5 and 3.5 minutes = 95.44% approx.