Question
Average of 10 observations calculated by a student was
60 but when he again went through his observations he realised that he took value of three observations as 62, 54 and 50 in place of 86, 40 and 70 respectively and also realised that total observations taken by him was 9. Find the original average of all observations taken by him.Solution
Sum of 10 observations = 10 × 60 = 600 Original average = {600 + (86 + 40 + 70) - (62 + 54 + 50)}/9 = 630/9 = 70
Which state led the assessments in Phase 1 of the Khelo India Rising Talent Identification (KIRTI) program?
When did the Mahatma Gandhi Institute (MGI) in Mauritius begin its operations?
- What technological innovation helped RBI win the Central Banking Digital Transformation Award 2025?
- Which country is finalizing a Joint Crediting Mechanism (JCM) with India for emission-reduction credits?
What is the notice period required to introduce a private member's bill in the Lok Sabha?Â
Which state became the second in India to be declared fully functionally literate under ULLAS?
What is the primary focus of the "Baltic Sentry" mission launched by NATO?
Which automobile company and the food order delivery platform, Zomato have come together in a strategic association to ensure a green and sustainable m...
What rank did India achieve in the Henley Passport Index 2025?
What is the key focus of Clause 6 of the Assam Accord, which was discussed between the Assam government and AASU?
Relevant for Exams:
