13. The average attendance of a school for the first three
days of a week is 125 and for four days is 320. How
many were present of the fourth day?
(A) 300
(B) 316
(C) 325
(D) 305
Answers
Option (D): 305 students were present on the fourth day.
Hi there,
As per the options are given, the data in the question seems to be incorrect. I have rewritten the correct question for you and solved it accordingly. Hope it is helpful. Thanks
Q. The average attendance of a school for the first three days of a week is 325 and for the first four days is 320 how many were present on the 4th day?
Step-by-step explanation:
Formula used:
- Average = [Sum of terms] / [No. of terms]
The average attendance of a school for the first 3 days of a week = 325
∴ The total attendance of the first 3 days of a week will be,
= 3 × 325
= 975
The average attendance of a school for 4 days of a week = 320
∴ The total attendance of 4 days of a week will be,
= 4 × 320
= 1280
Thus,
The attendance on the 4th day i.e., the no. of students present on that day is given by,
= [Total attendance of four days of a week] – [Total attendance of first 3 days of a week]
= 1280 – 975
= 305
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