Math, asked by tanmayv2876, 5 months ago

The mean of 3 numbers is 12. if two numbers are 9 and 6,find the third number​

Answers

Answered by Jinkalthakkar
0

Answer:

21 is the third number.

Step-by-step explanation:

Let the 3rd no. be x

mean= sum of observations / no. of observations

12 = 9+6+x / 3

36 = 15+x

36-15 = x

21 = x

Hope this helps!!

Answered by 9163
1

Answer:

The average of three numbers is 12. The 2 numbers are 15 and 10 respectively. What is the third number?

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We know Average = sum of numbers/no. of numbers

Sum of numbers = average × no. of numbers

Sum of three numbers = 12 × 3 = 36

Sum of first two numbers = 15 + 10 = 25

The third number = sum of three numbers - sum of two numbers

Third number = 36 - 25 = 11

Thus, the third number is 11

Answer the third number is 11

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