Q1. Average of a, b and c is 11; average of c, d and e is 17; average of e and f is 22 and average of e and c is 17. What is the average of a, b, c, d, e and f?
A. 15 2/3
B. 18 1/2
C. 16 1/2
D. 16 2/3
EXPLANATION
Answer: A
Explanation:
It is given,
A+ B + C / 3 = 11
a + b + c = 33 …… (1)
C + D + E / 3 = 17
c + d + e = 51 …… (2)
E + F / 2 = 22
e + f = 44 …… (3)
E + C / 2 = 17
e + c = 34 …… (4)
(1) + (2) + (3) – (4) we get the sum of a, b, c, d, e and f
a + b + c + d + e + f = (a+b+c) + (c+d+e) + (e+f) – (e+c) = 33 + 51 + 44 – 34 = 94
Average = 94 / 6 = 15 2/3
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