Maths Bond 10-11
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Maths Bond 10-11
Could anyone please help me on this question!!!!
The average 4 numbers is 10 1/2
If the average of 3 of them is 9 what is the 4th number????
Answer is 15
The average 4 numbers is 10 1/2
If the average of 3 of them is 9 what is the 4th number????
Answer is 15
Re: Maths Bond 10-11
So the total of the 4 numbers is 4x10.5 = 42The average of 4 numbers is 10 1/2
So the total of the 3 numbers is 3x9 =27If the average of 3 of them is 9
42-27=15
Re: Maths Bond 10-11
mitasol thanks for the response
much appreciated!!!!
much appreciated!!!!