2014 · Q38
If the average of A and B is 30, the average of C and D is 20, then which of the following is/are correct?
1. The average of B and C must be greater than 25.
2. The average of A and D must be less than 25.
Select the correct answer using the code given below:
Elementary MathematicsArithmetic
- A1 only
- B2 only
- CEither 1 or 2
- DNeither 1 nor 2
Explanation
A+B = 60, C+D = 40; (B+C)/2 and (A+D)/2 can each be on either side of 25 (e.g. A=B=30, C=D=20 gives both equal 25).