The average of 13 results is 60. If the average of 1st 7 results is 59

1.	The average of 13 results is 60. If the average of 1st 7 results is 59 and that of the last 7 is 61. What will be the 7th result?1. 652. 753. 554. 505. 60
Answer» Correct Answer - Option 5 : 60 Given: Average of 13 results = 60 Average of 1^st 7 results = 59 Average of the last 7 result = 61 Formula Used: Average = Sum/Number Calculations: As we know, Average = Sum/Number ⇒ 60 = S/13 ⇒ Sum = 780 ⇒ Sum of 1^st 7 numbers = 59 × 7 = 413 ⇒ Sum of last 7 numbers = 61 × 7 = 427 ⇒ 7^th result = Sum of 1^st 7 numbers + Sum of last 7 numbers - Sum of all the results ⇒ (413 + 427 - 780) ⇒ 840 - 780 ⇒ 60 ∴ The7^thresult is 60.

The average of 13 results is 60. If the average of 1st 7 results is 59 and that of the last 7 is 61. What will be the 7th result?1. 652. 753. 554. 505. 60

Answer» Correct Answer - Option 5 : 60

Given:

Average of 13 results = 60

Average of 1^st 7 results = 59

Average of the last 7 result = 61

Formula Used:

Average = Sum/Number

Calculations:

As we know,

Average = Sum/Number

⇒ 60 = S/13

⇒ Sum = 780

⇒ Sum of 1^st 7 numbers = 59 × 7 = 413

⇒ Sum of last 7 numbers = 61 × 7 = 427

⇒ 7^th result = Sum of 1^st 7 numbers + Sum of last 7 numbers - Sum of all the results

⇒ (413 + 427 - 780)

⇒ 840 - 780

⇒ 60

∴ The7^thresult is 60.

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The average of 13 results is 60. If the average of 1st 7 results is 59 and that of the last 7 is 61. What will be the 7th result?1. 652. 753. 554. 505. 60

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