12 సంఖ్యల సగటు 15. ఒకవేళ 41 అనే సంఖ్యని కూడా జతచేరిస్తే, 13 సంఖ్యల సగటు ఎంతవుతుంది?

  1. 16
  2. 18
  3. 19
  4. 17

Answer (Detailed Solution Below)

Option 4 : 17
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సంఖ్యల యొక్క సగటు = సంఖ్యల మొత్తం/ మొత్తం సంఖ్యలు

మొదటి 12 సంఖ్యల సగటు 15

12 సంఖ్యల మొత్తం = 15 × 12 = 180

కొత్త సంఖ్య 41 ని జతచేయాలి

13 సంఖ్యల యొక్క సగటు = (12 సంఖ్యల మొత్తం + 13వ సంఖ్య)/13

సగటు = (180 + 41)/13 = 221/13 = 17

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