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