The average of 7 numbers us 27. if one more number is included, the average becomes 25. the included number is
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average of 7 numbers=27
sum=27×7=189
let the included number be x
new average x=25
new number of observation=8
new sum of observation=25×8
=200 which is equal to 189+x
x=200-189
=11
so the value of included no is 11
sum=27×7=189
let the included number be x
new average x=25
new number of observation=8
new sum of observation=25×8
=200 which is equal to 189+x
x=200-189
=11
so the value of included no is 11
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