The average of 5 consecutive numbers is n. If the next two numbers are also included, the average will:
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
1 (increase by 1)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
The average of 5 consecutive terms is n, implies that the 3rd term is n.
Now as the next 2 terms are included implies that the new average for 7 terms would be the 4th term.
So, the 4th term would be n + 1.
Example:
(1 + 2 + 3 + 4 + 5)/5
= 15/5
= 3
(1 + 2 + 3 + 4 + 5 + 6 + 7)/7
= 28/7 = 4
∴ The average will increase by 1
