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11 Mar 2019, 02:45
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C
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Difficulty:
5%
(low)
Question Stats:
93% (00:43) correct
7%
(01:04)
wrong
based on 85
sessions
History
Date
Time
Result
Not Attempted Yet
The average of r, s, t, u is 10 and the average of r, s, t, u, v is 20. What is the value of v?
A. 30
B. 40
C. 60
D. 80
E. 100
A. 30
B. 40
C. 60
D. 80
E. 100
11 Mar 2019, 03:11
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Rashed12
The average of r, s, t, u is 10, so r+s+t+u=4*10=40
and the average of r, s, t, u, v is 20, so r+s+t+u+v=5*20=100 .
Therefore the value of v=100-40=60
C
11 Mar 2019, 03:27
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Rashed12
Sum of (r + s + t + u )= 10*4 = 40
Sum of ( r + s + t + u + v) = 20*5 = 100
Difference : ( r + s + t + u + v) - (r + s + t + u ) = 100 - 40 = 60.
C is the correct answer.
