the mean of 5 numbers is 7 if one more number is included the mean increases by 2. find the number included

Mean of 5 numbers = 7

∴Sum of 5 numbers = 7 × 5 = 35

Let the number added be x.

∴Sum of 6 numbers = 35 + x

Mean of 6 numbers = 7 + 2 =9

Therefore, the new number included is 19.

Hope you get it.

Cheers!

  • 17

12 is the answer

  • -12

how?   explain the process

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