Question

mean of 4,6,5,and a is 7 find the value of a​

Answer 1

4+5+6+a/4=7

15+a=28

a=28-15=13

Answer 2

mean of a group of numbers means

= sum of all observations / total no. of observations

mean =( 4 + 6 + 5 + a)/4

7 = (15+a)/4

7×4 = 15+a

28 - 15 = a

a= 13

hope it helps....

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