Math, asked by chirag659, 11 months ago

The average of eleven numbers is 60.If the average of first six numbers is 58 and that of the last six is 63 find the sixth number​

Answers

Answered by streetburner
2

Answer:

66

Step-by-step explanation:

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Let the numbers be n1 , n2 .....

(n1 + n2 + ...n11) = 660 .....(1)

(n1 + n2 + ..n6)= 348 .....(2)

(n6 + n7 + ..n11) = 378 .....(3)

(2)+(3) :

(n1 + ..n6 + ...n11) + n6 = 726

660 + n6 = 726

n6 = 726-660

= 66

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