The average of five quantities is 5. the average of three of the five quantities is 6. what is the average of the remaining two numbers?
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(a + b+ c + d + e)/5 = 5
a+b+c+d+e = 25
(a+b+c)/3 = 6
a+b+c= 18, substituting in above eqn.
18 + d + e = 25
d+e = 7
AVERAGE OF d&e, (d+e)/2 = 7/2
a+b+c+d+e = 25
(a+b+c)/3 = 6
a+b+c= 18, substituting in above eqn.
18 + d + e = 25
d+e = 7
AVERAGE OF d&e, (d+e)/2 = 7/2
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