Question

The average of three numbers is 11.if the average of the first two numbers is 12, what is he third number

Answer 1

Answer:

Step-by-step explanation:

Let the 3 numbers be a,b and c

Average= a+b+c/3 =11. (1)

Average of first two numbers is

a+b/2 =12

a+b =24 ..... Putting in equation 1

24+c/3 = 11

24+ c = 33

c = 9

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