Correct option is D
Concept Used:
· Calculate the average number of bulbs sold and then find the day with sales closest to this average.
Solution:
1. Total bulbs sold in the week = 225 + 100 + 150 + 200 + 75 + 90 = 840.
2. Average sale per day = 840 ÷ 6 = 140.
3. Sales on Wednesday were 150, which is closest to the average of 140.
Final Answer: (d) Wednesday.




