Question
Download Solution PDFFind x if the mean of the numbers 10, 4, 1, 15, 15, x, 12 and 14 is 10.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Mean of 10, 4, 1, 15, 15, x, 12 and 14 = 10
Formula used:
Mean of the data = Sum of the numbers / total numbers
Calculation:
Mean = 10
⇒ (10 + 4 + 1 + 15 + 15 + x + 12 + 14)/8 = 10
⇒ (71 + x)/8 = 10
⇒ 71 + x = 80
⇒ x = 80 - 71 = 9
Thus, x = 9
∴ The correct answer is option (3).
Last updated on Jun 2, 2025
-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.
-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.
->The candidates must have passed 10th with ITI or Diploma to be eligible for this post.
->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.
-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways.
-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.
-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here