Answer:
let x be the 7th number
Given
average of six numbers is 15
thus sum of 6 numbers is 15(6) = 90
when we add the 7th number the new average is 15+1 = 16
by eq
cross multiply
the 7th number is 22.
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Answer:
let x be the 7th number
Given
average of six numbers is 15
thus sum of 6 numbers is 15(6) = 90
when we add the 7th number the new average is 15+1 = 16
by eq
cross multiply
the 7th number is 22.