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4 out of 5 cricketers have played 13, 9, 5, 11 innings respectively. If the mean of the data set is 9, then the number of innings played by the 5th player isA. 9B. 8C. 7D. 61. C2. D3. B4. A |
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Answer» Correct Answer - Option 1 : C Given: 4 cricketers played 13, 9, 5, and 11 innings Mean = 9 Formula used: Mean = Sum of all observations/Number of observations Calculation: Let the 5th player played x innings. Sum of all innings played by 5 players = 13 + 9 + 5 + 11 + x ⇒ Sum of all innings = 38 + x Total players = 5 Mean = Sum of all innings played by 5 players/Total players ⇒ 9 = (38 + x)/5 ⇒ 45 = 38 + x ⇒ x = 45 – 38 = 7 ∴ Innings played by 5th player is 7 |
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